Mitsubishi FX2NC Series User manual

JY997D30701A
Safety Precaution (Read these precautions before use.)
This manual classifies the safety precautions into two categories:
and .
Depending on the circumstances, procedures indicated by may
also cause severe injury.
It is important to follow all precautions for personal safety.
Associated Manuals
How to obtain manuals
For product manuals or documents, consult with the Mitsubishi Electric dealer
from who you purchased your product.
Indicates that incorrect handling may cause hazardous
conditions, resulting in death or severe injury.
Indicates that incorrect handling may cause hazardous
conditions, resulting in medium or slight personal injury
or physical damage.
Manual name Manual No. Description
FX3UC Series
User’s Manual
- Hardware Edition
JY997D28701
MODEL CODE:
09R519
Explains the FX3UC Series PLC
specifications for I/O, wiring,
installation, and maintenance.
FX3U/FX3UC Series
Programming Manual
- Basic & Applied
Instruction Edition
JY997D16601
MODEL CODE:
09R517
Describes FX3U/FX3UC Series PLC
programming for basic/applied
instructions and devices.
FX2NC (DSS/DS) Series
Hardware Manual
JY992D76401
MODEL CODE:
09R509
Explains the FX2NC (DSS/DS)
Series PLC specifications for I/O,
wiring, installation, and
maintenance.
FX2NC (D/UL) Series
Hardware Manual JY992D87201
Explains the FX2NC (D/UL) Series
PLC specifications for I/O, wiring,
installation, and maintenance.
FX Series
Programming Manual II
JY992D88101
MODEL CODE:
09R512
Describes FX1S/FX1N/FX2N/FX2NC
Series PLC programming for basic/
applied instructions and devices.
Certification of UL, cUL standards
The following product has UL and cUL certification.
UL, cUL File Number:E95239
Models: MELSEC FX2NC series manufactured
from December 1st, 2007 FX2NC-1HC
Compliance with EC directive (CE Marking)
This note does not guarantee that an entire mechanical module produced in
accordance with the contents of this note will comply with the following standards.
Compliance to EMC directive and LVD directive for the entire mechanical module
should be checked by the user / manufacturer. For more details please contact the
local Mitsubishi Electric sales site.
Requirement for Compliance with EMC directive
The following products have shown compliance through direct testing (of the identified
standards below) and design analysis (through the creation of a technical construction
file) to the European Directive for Electromagnetic Compatibility (89/336/EEC) when
used as directed by the appropriate documentation.
Type: Programmable Controller (Open Type Equipment)
Models: MELSEC FX2NC series manufactured
from December 1st, 2007 FX2NC-1HC
1. Outline
The hardware high-speed counter block is a 2-phase 50 kHz high-speed counter. It is a
special function block for the FX2NC, FX3UC series PLC.
•FROM/TO instruction transfers the PLC data (i.e. parameters, comparing value and
present value).
•The FX2NC-1HC occupies 8 points of I/O on the FX2NC, FX3UC expansion bus. The
8 points can be allocated from either inputs or outputs.
However, 5V DC 90mA power is supplied from the main unit or extension power
supply units. There must be no power overload from this or any other extension unit.
Furthermore, another power supply is needed for the output circuit of the encoder or
the transistor.
•Differential-Line-Driver (AM26C31 or equivalent) and open collector output
encoders are available for FX2NC-1HC.
•The source of your input signal should be a 1 or 2 phase encoder. A 5V, 12V, or 24V
power source can be used. An initial value setting command input (PRESET) and a
count prohibit command input (DISABLE) are also available.
•The FX2NC-1HC has two outputs. When the counter value coincides with an output
compare value, the appropriate output is set ON. The output transistors are
individually isolated to allow either sink or source connection methods.
•Various counter modes, such as 1-phase or 2-phase, 16-bit or 32-bit modes, can be
selected using commands from the PLC. Allow the FX2NC-1HC unit to run only after
setting these mode parameters.
1.1 Incorporated Items
Verify that the following product and items are included in the packag e:
Standard Remark
EN61131-2:2003
Programmable controllers
- Equipment requirements and
tests
Compliance with all relevant aspects of the
standard.
EMI
• Radiated Emissions
• Mains Terminal Voltage Emissions
EMS
• RF immunity
• Fast Transients
• ESD
• Surge
• Conducted
• Power magnetic fields
Included Items
FX2NC-1HC 1 Unit
Special unit/block No. label 1 Sheet
Manuals [Japanese version, English version] 1 manual each
1.2 External Dimensions, Part Names, and Terminal Layout
No. Name
c
Status LED
PW
(Green)
Power LED
ON when the 5V power supply is normally supplied from the
PLC.
UP (Red) Up count LED The respective LED is ON according to up/
down count direction of the counter.
DN (Red) Down count LED
φA A phase input The respective LED is ON (flicker) according
to ON/OFF of φA and φB input.
φB B phase input
DS DISABLE input
LED The respective LED is ON/OFF according to
ON/OFF of PRESET and DISABLE input.
PR PRESET input
LED
YH YH output LED The respective LED is ON/OFF according to
status of YH and YS output.
YS YS output LED
dTerminal block (European type)
e
Extension connector (PLC side)
Used to connect this special function block to the FX2NC, FX3UC main unit or
extension block.
f
Slide lock
Used to fix the FX2NC extension block on the right side of this special function
block.
g
Extension connector (Extension side)
Used to connect the FX2NC extension block to the right of this special function
block. Remove this cover for connecting.
hDIN rail mounting hook
PW
FX -1HC
2NC
φ A
DS
A24+A12+
A5+
A-
B24+B12+B5+
B-
XD5COMDXP24
XP5
COMPYH-YS+
YS-
UP
DN
φ B
PR
YH
YS
XD24YH+
A24+
A12+
A5+
A-
B24+
B12+
B5+
B-
XD5
COMD
XP24
XP5
COMP
YH-
YS+
YS-
XD24
YH+
90(3.55")
20.2
(0.8") 74(2.92")
15
(0.6")
Weight: Approx. 0.13kg (0.29lbs)
(Includes terminal block)
Dimensions: mm (inches) Terminal layout
3
6
5
2
1 4
A phase
input
B phase
input
DISABLE
input
PRESET
input
YH
output
YS
output
2. Installation, Connect to the PLC
2.1 Installation
The FX 2NC -1HC can be installed on a DIN46277 rail (35 mm (1.38") wide).
2.2 Number of the connectable units
1) FX2NC PLC
Up to four special function units/blocks in total can be connected to the
FX2NC Series PLC including those connected to the FX2NC-CNV-IF.
2) FX3UC PLC
Up to eight special function units/blocks in total can be connected to the
FX3UC*1 Series PLC including those connected to the FX2NC-CNV-IF or
FX3UC-1PS-5V.
*1 Up to seven special function units/blocks in total can be connected to the
FX3UC-32MT-LT PLC. Unit numbers assigned to special function units/
blocks begins with No.1.
2.3 Connection to the PLC
When connecting
the FX2NC-1HC to
the FX2NC / FX3UC
Series main unit or
extension block,
remove the
extension port
cover from the right
side of the main
unit or extension
block, keep the
slide lock in the
main unit or
extension block
pulled upward,
then align the hook
in the FX2NC-1HC with the mounting hole in the former step of the main unit or
extension block.
Then push the slide lock downward to fix the FX2NC-1HC. When connecting two
or more FX2NC-1HC units, connect an FX2NC-1HC unit to another FX2NC-1HC
unit in the same way.
3. Wiring (Power supply and analog input)
INSTALLATION
PRECAUTIONS
•Make sure to cut off all phases of the power supply externally before
attempting installation or wiring work.
Failure to do so may cause electric shock or damage to the product.
INSTALLATION
PRECAUTIONS
•Use the product within the generic environment specifications described in PLC
main unit manual.
Never use the product in areas with excessive dust, oily smoke, conductive
dusts, corrosive gas (salt air, Cl2, H2S, SO2, or NO2), flammable gas, vibration
or impacts, or expose it to high temperature, condensation, or rain and wind.
If the product is used in such conditions, electric shock, fire, malfunctions,
deterioration or damage may occur.
•When drilling screw holes or wiring, make sure cutting or wire debris does
not enter the ventilation slits.
Failure to do so may cause fire, equipment failures or malfunctions.
•Connect FX2NC-1HC securely to their designated connectors.
Loose connections may cause malfunctions.
•Use screwdrivers carefully when performing installation work, thus avoiding
accident or product damage.
WIRING
PRECAUTIONS
•Make sure to cut off all phases of the power supply externally before
attempting installation or wiring work.
Failure to do so may cause electric shock or damage to the product.
WIRING
PRECAUTIONS
•Make sure to cut off all phases of the power supply externally before
attempting installation or wiring work.
Failure to do so may cause electric shock or damage to the product.
hook
hook
Main unit
FX
2NC -1HC
3.1 Wire and Terminal Tightening Torque
3.1.1 Cable
1) Applicable cable
2) Termination
Strip the coating of strand wire and twist the cable core before connecting it,
or strip the coating of single wire before connecting it. An alternative
connection is to use a ferrule with insulating sleeve.
•Stranded wire/solid wire •Bar terminal with insulating sleeve
When using a stick terminal with an insulating sleeve, choose a wire with
proper cable sheath referring to the above outside dimensions, otherwise the
wire cannot be inserted easily.
3.1.2 Tightening Torque
Tightening torque should be between 0.22 and 0.25 N•m.
Tool
To tighten terminals, use a purchased
small-sized screwdriver whose head is
straight and is not widened as shown in
the right figure.
Note:
If the diameter of screwdriver grip is too
small, tightening torque will not be able
to be achieved. Use the following recommended screwdriver or an appropriate
replacement (grip diameter: approximately 25mm).
3.2 Wiring
Note;
Make sure to properly wire in accordance with the encoder output specifications.
Incorrect wiring may cause accidents or damage to the product.
•Make sure to observe the following precautions in order to prevent any
damage to the machinery or accidents due to abnormal data written to the
PLC under the influence of noise:
1) Do not bundle the main circuit line together with or lay it close to the main
circuit, high-voltage line or load line.
Otherwise, noise disturbance and/or surge induction are likely to take
place. As a guideline, lay the control line at least 100mm (3.94") or more
away from the main circuit or high-voltage lines.
2) Ground the shield wire or shield of the shielded cable at one point on the
PLC. However, do not use common grounding with heavy electrical
systems.
•Make sure to properly wire to the European terminal board in accordance
with the following precautions.
Failure to do so may cause electric shock, a short-circuit, wire breakage, or
damage to the product.
- The disposal size of the cable end should follow the dimensions described
by the this manual.
- Tightening torque should follow the specifications by the this manual.
- Twist the end of strand wire and make sure that there are no loose wires.
- Do not solder-plate the electric wire ends.
- Do not connect more than the specified number of wires or electric wires
of unspecified size.
- Affix the electric wires so that neither the terminal block nor the connected
parts are directly stressed.
Typ e Wire size
Single wire 0.3mm2to 0.5mm2(AWG22 to 20)
Double wire 0.3mm2(AWG22)*2
Manufacturer Model Pressure bonding tool
Phoenix Contact AI 0.5-8WH CRIMPFOX ZA 3
(or CRIMPFOX UD 6)
Manufacturer Model
Phoenix Contact SZS 0.4×2.5
WIRING
PRECAUTIONS
9mm
(0.36")
Termination of
cable end
8mm
(0.32")
Contact area
(Crimp area)
14mm(0.56")
2.6mm
(0.11")
Insulating sleeve
0.4mm
(0.02")
2.5mm
(0.1")
With
straight tip
3.2.1 NPN output encoders
3.2.2 PNP output encoders
*1. Drive power supply of the encoder.
Use either 24V DC, 12V DC, or 5V DC according to the encoder type.
When connecting the A phase, the B phase, and the Z phase to FX
2NC -1HC,
connect to the power supply terminal.
When using 24V DC for PRESET and DISABLE signals, connect to the 24V
DC (XP24, XD24) terminal.
*3. This wiring is unnecessary when not using the PRESET function and the
DISABLE function.
Encoder (NPN)
+24V
0V
DC24V
*1
*1
Phase
B
Phase
Z
Phase
A
Class D
*2
Shielded
Twisted-Pair
Shielded
Twisted-Pair
PRESET
*3
DISABLE
*3
A24+
A12+
A 5+
A -
3.3k
1.5k
0.27k
0.1k
B24+
A12+
B 5+
B -
3.3k
1.5k
0.27k
0.1k
XD24
XD 5
COMD
1.5k
0.5k
0.2k
XP24
XP 5
COMP
1.5k
0.5k
0.2k
FX 2NC -1HC
FX 2NC
FX 3UC
*1
*1
*1
*2. Grounding resistance 100 Ω or less.
*1
Encoder (PNP)
+24V
0V
DC24V
*1
*1
Phase
B
Phase
Z
Class D
*2
Shielded
Twisted-Pair
Shielded
Twisted-Pair
PRESET
*3
DISABLE
*3
A24+
A12+
A 5+
A -
3.3k
1.5k
0.27k
0.1k
B24+
A12+
B 5+
B -
3.3k
1.5k
0.27k
0.1k
XD24
XD 5
COMD
1.5k
0.5k
0.2k
XP24
XP 5
COMP
1.5k
0.5k
0.2k
FX 2NC -1HC
FX 2NC
FX 3UC
Phase
A
*1
*1
*1
*1
*1. Drive power supply of the encoder.
Use either 24V DC, 12V DC, or 5V DC according to the encoder type.
When connecting the A phase, the B phase, and the Z phase to FX
2NC -1HC,
connect to the power supply terminal.
When using 24V DC for PRESET and DISABLE signals, connect to the 24V
DC (XP24, XD24) terminal.
*3. This wiring is unnecessary when not using the PRESET function and the
DISABLE function.
*2. Grounding resistance 100 Ω or less.
3.2.3 Differential-Line-Driver output encoders
When applying the Differential-Line-Driver encoder (AM26C31 or equivalent) to
FX2NC-1HC, connect the encoder output with the 5V DC terminal as shown in the left
figure.
3.2.4 YH, YS output wiring [Sink wiring]
3.2.5 YH, YS output wiring [Source wiring]
4. Specifications
DESIGN
PRECAUTIONS
•Make sure to have the following safety circuits outside of the PLC to ensure safe
system operation even during external power supply problems or PLC failure.
Otherwise, malfunctions may cause serious accidents.
1) Most importantly, have the following: an emergency stop circuit, a protection
circuit, an interlock circuit for opposite movements (such as normal vs.
reverse rotation), and an interlock circuit (to prevent damage to the
equipment at the upper and lower positioning limits).
2) Note that when the PLC CPU detects an error, such as a watchdog timer
error, during self-diagnosis, all outputs are turned off. Also, when an error that
cannot be detected by the PLC CPU occurs in an input/output control block,
output control may be disabled.
External circuits and mechanisms should be designed to ensure safe
machinery operation in such a case.
3) Note that when an error occurs in a relay, triac or transistor output device, the
output could be held either on or off.
For output signals that may lead to serious accidents, external circuits and
mechanisms should be designed to ensure safe machinery operation in such
a case.
DESIGN
PRECAUTIONS
•Do not bundle the control line together with or lay it close to the main circuit or
power line. As a guideline, lay the control line at least 100mm (3.94") or more
away from the main circuit or power line.
Noise may cause malfunctions.
Encoder
Class D
*1
Shielded
Twisted-Pair
FX 2NC -1HC
FX 2NC
FX 3UC
A 5+
A -
0.27k
0.1k
B 5+
B -
0.27k
0.1k
XD 5
COMD
0.5k
0.2k
+5V
0V
DC5V
LA
LAR
LBR
LB
XP 5
COMP
0.5k
0.2k
PRESET
*2
Shielded
Twisted-Pair
*1. Grounding resistance 100 Ω or less.
*2. This wiring is unnecessary when not using the PRESET function and the
DISABLE function.
DISABLE
*2
YH+
YH-
YS+
YS-
Output load driving
power, 5 - 24V DC
FX 2NC -1HC
Fuse
YH+
YH-
YS+
YS-
Output load
driving power,
5 - 24V DC
FX 2NC -1HC
Fuse
4.1 General Specifications
The general specifications are equivalent to the PLC main unit.
(For general specifications, refer to the manual of the PLC main unit.)
4.2 Power Supply Specifications
4.3 Performance Specifications
Item Specifications
Units driving power 5V DC, 90mA (Internal power supply from main unit or
extension power supply unit)
Item Specification
Input
signal
Signal
level
(Selected
by terminal
connec-
tion)
Phase A,
Phase B
[A24+],
[B24+]
24V DC±10%,
7mA or less
[A12+],
[B12+]
12V DC±10%,
7mA or less
[A5+],
[B5+]
3.0V to 5.5V DC,
12.5mA or less
PRESET,
DISABLE
[XP24],
[XD24]
10.8V to 26.4V DC,
15mA or less
[XP5],
[XD5]
5V DC±10%,
8mA or less
MAX.
frequency
1-phase
input
1 input
50kHz2 input
2-phase
input
1 edge count
2 edge count 25kHz
4 edge count 12.5kHz
Pulse
shape
t1(Rise/fall time): 3µs or less
t2(ON/OFF pulse): 6µs or more (at 50kHz)
t3(Phase difference between A and B):
3.5µs or more (at 50kHz)
PRESET(Z phase) input 100µs or more
DISABLE (count prohibit) input 100µs or more
Count-
ing spec-
ification
Format
Automatic UP/DOWN
However, when on 1-phase 1-input mode, UP/
DOWN is determined below.
•Hardware UP/DOWN:
Up/down count is decided by OFF/ON of the A-
phase input terminal.
•Software UP/DOWN:
Up/down count is decided by the current value
(K0/K1) of BFM #1.
Range
When 32-bit is specified:
-2,147,483,648 to +2,147,483,647
When 16-bit is specified: 0 to 65,535
(upper limit is set up by BFM #3, #2.)
Compari-
son Type
Each output is set when the present value of the
counter matches with the compare value, and is
switched OFF by a reset command.
YH: Direct output processed by hardware.
YS: Software processed output with worst delay
time of 300µs.
Therefore, when the input frequency is 50 kHz,
there is a worst case delay of 15 input pulses.
Output
signal
Types of
outputs
YH +: transistor output for
YH output
YH -: transistor output for
YH output
YS +: transistor output for
YS output
YS -: transistor output for YS output
Output
capacity 5V ~ 24V DC, 0.5A
I/O occupation 8 points (can be either inputs or outputs)
t1 t1
t2 t2
t3
t3
YH+,
YS+
YH-,
YS-
FX2NC-1HC
USER’S MANUAL
This manual describes the part names, dimensions, mounting, wiring, and
specifications of the product. Before use, read this manual and the manuals of
all relevant products fully to acquire proficiency in handling and operating the
product. Make sure to learn all the product information, safety information, and
precautions.
Store this manual in a safe place so that it can be taken out and read whenever
necessary. Always forward it to the end user.
Registration:
The company and product names described in this manual are registered
trademarks or the trademarks of their respective companies.
Effective December 2007
Specifications are subject to change without notice.
©2007 Mitsubishi Electric Corporation
Manual Number JY997D30701
Revision A
Date December 2007

JY997D30701A
Safety Precaution (Read these precautions before use.)
This manual classifies the safety precautions into two categories:
and .
Depending on the circumstances, procedures indicated by may
also cause severe injury.
It is important to follow all precautions for personal safety.
Associated Manuals
How to obtain manuals
For product manuals or documents, consult with the Mitsubishi Electric dealer
from who you purchased your product.
Indicates that incorrect handling may cause hazardous
conditions, resulting in death or severe injury.
Indicates that incorrect handling may cause hazardous
conditions, resulting in medium or slight personal injury
or physical damage.
Manual name Manual No. Description
FX3UC Series
User’s Manual
- Hardware Edition
JY997D28701
MODEL CODE:
09R519
Explains the FX3UC Series PLC
specifications for I/O, wiring,
installation, and maintenance.
FX3U/FX3UC Series
Programming Manual
- Basic & Applied
Instruction Edition
JY997D16601
MODEL CODE:
09R517
Describes FX3U/FX3UC Series PLC
programming for basic/applied
instructions and devices.
FX2NC (DSS/DS) Series
Hardware Manual
JY992D76401
MODEL CODE:
09R509
Explains the FX2NC (DSS/DS)
Series PLC specifications for I/O,
wiring, installation, and
maintenance.
FX2NC (D/UL) Series
Hardware Manual JY992D87201
Explains the FX2NC (D/UL) Series
PLC specifications for I/O, wiring,
installation, and maintenance.
FX Series
Programming Manual II
JY992D88101
MODEL CODE:
09R512
Describes FX1S/FX1N/FX2N/FX2NC
Series PLC programming for basic/
applied instructions and devices.
Certification of UL, cUL standards
The following product has UL and cUL certification.
UL, cUL File Number:E95239
Models: MELSEC FX2NC series manufactured
from December 1st, 2007 FX2NC-1HC
Compliance with EC directive (CE Marking)
This note does not guarantee that an entire mechanical module produced in
accordance with the contents of this note will comply with the following standards.
Compliance to EMC directive and LVD directive for the entire mechanical module
should be checked by the user / manufacturer. For more details please contact the
local Mitsubishi Electric sales site.
Requirement for Compliance with EMC directive
The following products have shown compliance through direct testing (of the identified
standards below) and design analysis (through the creation of a technical construction
file) to the European Directive for Electromagnetic Compatibility (89/336/EEC) when
used as directed by the appropriate documentation.
Type: Programmable Controller (Open Type Equipment)
Models: MELSEC FX2NC series manufactured
from December 1st, 2007 FX2NC-1HC
1. Outline
The hardware high-speed counter block is a 2-phase 50 kHz high-speed counter. It is a
special function block for the FX2NC, FX3UC series PLC.
•FROM/TO instruction transfers the PLC data (i.e. parameters, comparing value and
present value).
•The FX2NC-1HC occupies 8 points of I/O on the FX2NC, FX3UC expansion bus. The
8 points can be allocated from either inputs or outputs.
However, 5V DC 90mA power is supplied from the main unit or extension power
supply units. There must be no power overload from this or any other extension unit.
Furthermore, another power supply is needed for the output circuit of the encoder or
the transistor.
•Differential-Line-Driver (AM26C31 or equivalent) and open collector output
encoders are available for FX2NC-1HC.
•The source of your input signal should be a 1 or 2 phase encoder. A 5V, 12V, or 24V
power source can be used. An initial value setting command input (PRESET) and a
count prohibit command input (DISABLE) are also available.
•The FX2NC-1HC has two outputs. When the counter value coincides with an output
compare value, the appropriate output is set ON. The output transistors are
individually isolated to allow either sink or source connection methods.
•Various counter modes, such as 1-phase or 2-phase, 16-bit or 32-bit modes, can be
selected using commands from the PLC. Allow the FX2NC-1HC unit to run only after
setting these mode parameters.
1.1 Incorporated Items
Verify that the following product and items are included in the packag e:
Standard Remark
EN61131-2:2003
Programmable controllers
- Equipment requirements and
tests
Compliance with all relevant aspects of the
standard.
EMI
• Radiated Emissions
• Mains Terminal Voltage Emissions
EMS
• RF immunity
• Fast Transients
• ESD
• Surge
• Conducted
• Power magnetic fields
Included Items
FX2NC-1HC 1 Unit
Special unit/block No. label 1 Sheet
Manuals [Japanese version, English version] 1 manual each
1.2 External Dimensions, Part Names, and Terminal Layout
No. Name
c
Status LED
PW
(Green)
Power LED
ON when the 5V power supply is normally supplied from the
PLC.
UP (Red) Up count LED The respective LED is ON according to up/
down count direction of the counter.
DN (Red) Down count LED
φA A phase input The respective LED is ON (flicker) according
to ON/OFF of φA and φB input.
φB B phase input
DS DISABLE input
LED The respective LED is ON/OFF according to
ON/OFF of PRESET and DISABLE input.
PR PRESET input
LED
YH YH output LED The respective LED is ON/OFF according to
status of YH and YS output.
YS YS output LED
dTerminal block (European type)
e
Extension connector (PLC side)
Used to connect this special function block to the FX2NC, FX3UC main unit or
extension block.
f
Slide lock
Used to fix the FX2NC extension block on the right side of this special function
block.
g
Extension connector (Extension side)
Used to connect the FX2NC extension block to the right of this special function
block. Remove this cover for connecting.
hDIN rail mounting hook
PW
FX -1HC
2NC
φ A
DS
A24+A12+
A5+
A-
B24+B12+B5+
B-
XD5COMDXP24
XP5
COMPYH-YS+
YS-
UP
DN
φ B
PR
YH
YS
XD24YH+
A24+
A12+
A5+
A-
B24+
B12+
B5+
B-
XD5
COMD
XP24
XP5
COMP
YH-
YS+
YS-
XD24
YH+
90(3.55")
20.2
(0.8") 74(2.92")
15
(0.6")
Weight: Approx. 0.13kg (0.29lbs)
(Includes terminal block)
Dimensions: mm (inches) Terminal layout
3
6
5
2
1 4
A phase
input
B phase
input
DISABLE
input
PRESET
input
YH
output
YS
output
2. Installation, Connect to the PLC
2.1 Installation
The FX 2NC -1HC can be installed on a DIN46277 rail (35 mm (1.38") wide).
2.2 Number of the connectable units
1) FX2NC PLC
Up to four special function units/blocks in total can be connected to the
FX2NC Series PLC including those connected to the FX2NC-CNV-IF.
2) FX3UC PLC
Up to eight special function units/blocks in total can be connected to the
FX3UC*1 Series PLC including those connected to the FX2NC-CNV-IF or
FX3UC-1PS-5V.
*1 Up to seven special function units/blocks in total can be connected to the
FX3UC-32MT-LT PLC. Unit numbers assigned to special function units/
blocks begins with No.1.
2.3 Connection to the PLC
When connecting
the FX2NC-1HC to
the FX2NC / FX3UC
Series main unit or
extension block,
remove the
extension port
cover from the right
side of the main
unit or extension
block, keep the
slide lock in the
main unit or
extension block
pulled upward,
then align the hook
in the FX2NC-1HC with the mounting hole in the former step of the main unit or
extension block.
Then push the slide lock downward to fix the FX2NC-1HC. When connecting two
or more FX2NC-1HC units, connect an FX2NC-1HC unit to another FX2NC-1HC
unit in the same way.
3. Wiring (Power supply and analog input)
INSTALLATION
PRECAUTIONS
•Make sure to cut off all phases of the power supply externally before
attempting installation or wiring work.
Failure to do so may cause electric shock or damage to the product.
INSTALLATION
PRECAUTIONS
•Use the product within the generic environment specifications described in PLC
main unit manual.
Never use the product in areas with excessive dust, oily smoke, conductive
dusts, corrosive gas (salt air, Cl2, H2S, SO2, or NO2), flammable gas, vibration
or impacts, or expose it to high temperature, condensation, or rain and wind.
If the product is used in such conditions, electric shock, fire, malfunctions,
deterioration or damage may occur.
•When drilling screw holes or wiring, make sure cutting or wire debris does
not enter the ventilation slits.
Failure to do so may cause fire, equipment failures or malfunctions.
•Connect FX2NC-1HC securely to their designated connectors.
Loose connections may cause malfunctions.
•Use screwdrivers carefully when performing installation work, thus avoiding
accident or product damage.
WIRING
PRECAUTIONS
•Make sure to cut off all phases of the power supply externally before
attempting installation or wiring work.
Failure to do so may cause electric shock or damage to the product.
WIRING
PRECAUTIONS
•Make sure to cut off all phases of the power supply externally before
attempting installation or wiring work.
Failure to do so may cause electric shock or damage to the product.
hook
hook
Main unit
FX
2NC -1HC
3.1 Wire and Terminal Tightening Torque
3.1.1 Cable
1) Applicable cable
2) Termination
Strip the coating of strand wire and twist the cable core before connecting it,
or strip the coating of single wire before connecting it. An alternative
connection is to use a ferrule with insulating sleeve.
•Stranded wire/solid wire •Bar terminal with insulating sleeve
When using a stick terminal with an insulating sleeve, choose a wire with
proper cable sheath referring to the above outside dimensions, otherwise the
wire cannot be inserted easily.
3.1.2 Tightening Torque
Tightening torque should be between 0.22 and 0.25 N•m.
Tool
To tighten terminals, use a purchased
small-sized screwdriver whose head is
straight and is not widened as shown in
the right figure.
Note:
If the diameter of screwdriver grip is too
small, tightening torque will not be able
to be achieved. Use the following recommended screwdriver or an appropriate
replacement (grip diameter: approximately 25mm).
3.2 Wiring
Note;
Make sure to properly wire in accordance with the encoder output specifications.
Incorrect wiring may cause accidents or damage to the product.
•Make sure to observe the following precautions in order to prevent any
damage to the machinery or accidents due to abnormal data written to the
PLC under the influence of noise:
1) Do not bundle the main circuit line together with or lay it close to the main
circuit, high-voltage line or load line.
Otherwise, noise disturbance and/or surge induction are likely to take
place. As a guideline, lay the control line at least 100mm (3.94") or more
away from the main circuit or high-voltage lines.
2) Ground the shield wire or shield of the shielded cable at one point on the
PLC. However, do not use common grounding with heavy electrical
systems.
•Make sure to properly wire to the European terminal board in accordance
with the following precautions.
Failure to do so may cause electric shock, a short-circuit, wire breakage, or
damage to the product.
- The disposal size of the cable end should follow the dimensions described
by the this manual.
- Tightening torque should follow the specifications by the this manual.
- Twist the end of strand wire and make sure that there are no loose wires.
- Do not solder-plate the electric wire ends.
- Do not connect more than the specified number of wires or electric wires
of unspecified size.
- Affix the electric wires so that neither the terminal block nor the connected
parts are directly stressed.
Typ e Wire size
Single wire 0.3mm2to 0.5mm2(AWG22 to 20)
Double wire 0.3mm2(AWG22)*2
Manufacturer Model Pressure bonding tool
Phoenix Contact AI 0.5-8WH CRIMPFOX ZA 3
(or CRIMPFOX UD 6)
Manufacturer Model
Phoenix Contact SZS 0.4×2.5
WIRING
PRECAUTIONS
9mm
(0.36")
Termination of
cable end
8mm
(0.32")
Contact area
(Crimp area)
14mm(0.56")
2.6mm
(0.11")
Insulating sleeve
0.4mm
(0.02")
2.5mm
(0.1")
With
straight tip
3.2.1 NPN output encoders
3.2.2 PNP output encoders
*1. Drive power supply of the encoder.
Use either 24V DC, 12V DC, or 5V DC according to the encoder type.
When connecting the A phase, the B phase, and the Z phase to FX
2NC -1HC,
connect to the power supply terminal.
When using 24V DC for PRESET and DISABLE signals, connect to the 24V
DC (XP24, XD24) terminal.
*3. This wiring is unnecessary when not using the PRESET function and the
DISABLE function.
Encoder (NPN)
+24V
0V
DC24V
*1
*1
Phase
B
Phase
Z
Phase
A
Class D
*2
Shielded
Twisted-Pair
Shielded
Twisted-Pair
PRESET
*3
DISABLE
*3
A24+
A12+
A 5+
A -
3.3k
1.5k
0.27k
0.1k
B24+
A12+
B 5+
B -
3.3k
1.5k
0.27k
0.1k
XD24
XD 5
COMD
1.5k
0.5k
0.2k
XP24
XP 5
COMP
1.5k
0.5k
0.2k
FX 2NC -1HC
FX 2NC
FX 3UC
*1
*1
*1
*2. Grounding resistance 100 Ω or less.
*1
Encoder (PNP)
+24V
0V
DC24V
*1
*1
Phase
B
Phase
Z
Class D
*2
Shielded
Twisted-Pair
Shielded
Twisted-Pair
PRESET
*3
DISABLE
*3
A24+
A12+
A 5+
A -
3.3k
1.5k
0.27k
0.1k
B24+
A12+
B 5+
B -
3.3k
1.5k
0.27k
0.1k
XD24
XD 5
COMD
1.5k
0.5k
0.2k
XP24
XP 5
COMP
1.5k
0.5k
0.2k
FX 2NC -1HC
FX 2NC
FX 3UC
Phase
A
*1
*1
*1
*1
*1. Drive power supply of the encoder.
Use either 24V DC, 12V DC, or 5V DC according to the encoder type.
When connecting the A phase, the B phase, and the Z phase to FX
2NC -1HC,
connect to the power supply terminal.
When using 24V DC for PRESET and DISABLE signals, connect to the 24V
DC (XP24, XD24) terminal.
*3. This wiring is unnecessary when not using the PRESET function and the
DISABLE function.
*2. Grounding resistance 100 Ω or less.
3.2.3 Differential-Line-Driver output encoders
When applying the Differential-Line-Driver encoder (AM26C31 or equivalent) to
FX2NC-1HC, connect the encoder output with the 5V DC terminal as shown in the left
figure.
3.2.4 YH, YS output wiring [Sink wiring]
3.2.5 YH, YS output wiring [Source wiring]
4. Specifications
DESIGN
PRECAUTIONS
•Make sure to have the following safety circuits outside of the PLC to ensure safe
system operation even during external power supply problems or PLC failure.
Otherwise, malfunctions may cause serious accidents.
1) Most importantly, have the following: an emergency stop circuit, a protection
circuit, an interlock circuit for opposite movements (such as normal vs.
reverse rotation), and an interlock circuit (to prevent damage to the
equipment at the upper and lower positioning limits).
2) Note that when the PLC CPU detects an error, such as a watchdog timer
error, during self-diagnosis, all outputs are turned off. Also, when an error that
cannot be detected by the PLC CPU occurs in an input/output control block,
output control may be disabled.
External circuits and mechanisms should be designed to ensure safe
machinery operation in such a case.
3) Note that when an error occurs in a relay, triac or transistor output device, the
output could be held either on or off.
For output signals that may lead to serious accidents, external circuits and
mechanisms should be designed to ensure safe machinery operation in such
a case.
DESIGN
PRECAUTIONS
•Do not bundle the control line together with or lay it close to the main circuit or
power line. As a guideline, lay the control line at least 100mm (3.94") or more
away from the main circuit or power line.
Noise may cause malfunctions.
Encoder
Class D
*1
Shielded
Twisted-Pair
FX 2NC -1HC
FX 2NC
FX 3UC
A 5+
A -
0.27k
0.1k
B 5+
B -
0.27k
0.1k
XD 5
COMD
0.5k
0.2k
+5V
0V
DC5V
LA
LAR
LBR
LB
XP 5
COMP
0.5k
0.2k
PRESET
*2
Shielded
Twisted-Pair
*1. Grounding resistance 100 Ω or less.
*2. This wiring is unnecessary when not using the PRESET function and the
DISABLE function.
DISABLE
*2
YH+
YH-
YS+
YS-
Output load driving
power, 5 - 24V DC
FX 2NC -1HC
Fuse
YH+
YH-
YS+
YS-
Output load
driving power,
5 - 24V DC
FX 2NC -1HC
Fuse
4.1 General Specifications
The general specifications are equivalent to the PLC main unit.
(For general specifications, refer to the manual of the PLC main unit.)
4.2 Power Supply Specifications
4.3 Performance Specifications
Item Specifications
Units driving power 5V DC, 90mA (Internal power supply from main unit or
extension power supply unit)
Item Specification
Input
signal
Signal
level
(Selected
by terminal
connec-
tion)
Phase A,
Phase B
[A24+],
[B24+]
24V DC±10%,
7mA or less
[A12+],
[B12+]
12V DC±10%,
7mA or less
[A5+],
[B5+]
3.0V to 5.5V DC,
12.5mA or less
PRESET,
DISABLE
[XP24],
[XD24]
10.8V to 26.4V DC,
15mA or less
[XP5],
[XD5]
5V DC±10%,
8mA or less
MAX.
frequency
1-phase
input
1 input
50kHz2 input
2-phase
input
1 edge count
2 edge count 25kHz
4 edge count 12.5kHz
Pulse
shape
t1(Rise/fall time): 3µs or less
t2(ON/OFF pulse): 6µs or more (at 50kHz)
t3(Phase difference between A and B):
3.5µs or more (at 50kHz)
PRESET(Z phase) input 100µs or more
DISABLE (count prohibit) input 100µs or more
Count-
ing spec-
ification
Format
Automatic UP/DOWN
However, when on 1-phase 1-input mode, UP/
DOWN is determined below.
•Hardware UP/DOWN:
Up/down count is decided by OFF/ON of the A-
phase input terminal.
•Software UP/DOWN:
Up/down count is decided by the current value
(K0/K1) of BFM #1.
Range
When 32-bit is specified:
-2,147,483,648 to +2,147,483,647
When 16-bit is specified: 0 to 65,535
(upper limit is set up by BFM #3, #2.)
Compari-
son Type
Each output is set when the present value of the
counter matches with the compare value, and is
switched OFF by a reset command.
YH: Direct output processed by hardware.
YS: Software processed output with worst delay
time of 300µs.
Therefore, when the input frequency is 50 kHz,
there is a worst case delay of 15 input pulses.
Output
signal
Types of
outputs
YH +: transistor output for
YH output
YH -: transistor output for
YH output
YS +: transistor output for
YS output
YS -: transistor output for YS output
Output
capacity 5V ~ 24V DC, 0.5A
I/O occupation 8 points (can be either inputs or outputs)
t1 t1
t2 t2
t3
t3
YH+,
YS+
YH-,
YS-
FX2NC-1HC
USER’S MANUAL
This manual describes the part names, dimensions, mounting, wiring, and
specifications of the product. Before use, read this manual and the manuals of
all relevant products fully to acquire proficiency in handling and operating the
product. Make sure to learn all the product information, safety information, and
precautions.
Store this manual in a safe place so that it can be taken out and read whenever
necessary. Always forward it to the end user.
Registration:
The company and product names described in this manual are registered
trademarks or the trademarks of their respective companies.
Effective December 2007
Specifications are subject to change without notice.
©2007 Mitsubishi Electric Corporation
Manual Number JY997D30701
Revision A
Date December 2007

This manual confers no industrial property rights or any rights of any other kind,
nor does it confer any patent licenses. Mitsubishi Electric Corporation cannot be
held responsible for any problems involving industrial property rights which may
occur as a result of using the contents noted in this manual.
Warranty
Mitsubishi will not be held liable for damage caused by factors found not to be
the cause of Mitsubishi; opportunity loss or lost profits caused by faults in the
Mitsubishi products; damage, secondary damage, accident compensation
caused by special factors unpredictable by Mitsubishi; damages to products
other than Mitsubishi products; and to other duties.
For safe use
This product has been manufactured as a general-purpose part for general
industries, and has not been designed or manufactured to be incorporated in
a device or system used in purposes related to human life.
Before using the product for special purposes such as nuclear power, electric
power, aerospace, medicine or passenger movement vehicles, consult with
Mitsubishi Electric.
This product has been manufactured under strict quality control. However
when installing the product where major accidents or losses could occur if the
product fails, install appropriate backup or failsafe functions in the system.
•
•
•
HEAD OFFICE
HIMEJI WORKS
: TOKYO BUILDING, 2-7-3 MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310,
JAPAN
: 840, CHIYODA CHO, HIMEJI, JAPAN
5. Buffer Memories (BFM)
5.1 Buffer memory List
Note;
1) When writing in BFM #0 (counter mode), the BFM #1 to #31 will be initialized.
After setting the counter mode (BFM #0), other BFM(s) have to be setup.
When setting the counter mode, use a TOP (pulsed) instruction, or M8002
(initial pulse) to drive the TO instruction.
2) Read/Write of 16 bit data
When using a positive value between K32,768 and K65,535 with 16 bit
counters, read/writes of data, such as the current value, ring length, preset
data, and the YH/YS compare value, should use the 32-bit forms of the
FROM/TO instructions ((D) FROM, (D) TO).
5.2 Details of buffer memories
5.2.1 Counter mode [BFM #0]
The counter mode is shown in the upper right table. (Default value: K0)
Note;
When writing in BFM #0 (counter mode), the BFM #1 to #31 will be initialized.
After setting the counter mode (BFM #0), other BFM(s) have to be setup.
When setting the counter mode, use a TOP (pulsed) instruction, or M8002 (initial
pulse) to drive the TO instruction.
BFM # Description Default BFM
Access
BFM #0 Counter mode (Setting range: K0 to K11) K0 R/W
BFM #1 DOWN/UP command
1-phase 1-input mode (S/W counter) only K0 R/W
BFM #2
Ring length
Lower
K65536
R/W
BFM #3 Upper R/W
BFM #4 Command K0 R/W
BFM #5
~ #9 Not available - -
BFM #10
Preset data
Lower
K0
R/W
BFM #11 Upper R/W
BFM #12
YH compare value
Lower
K32767
R/W
BFM #13 Upper R/W
BFM #14
YS compare value
Lower
K32767
R/W
BFM #15 Upper R/W
BFM #16
~ #19 Not available - -
BFM #20
Counter current value
Lower
K0
R/W
BFM #21 Upper R/W
BFM #22
Maximum count value
Lower
K0
R/W
BFM #23 Upper R/W
BFM #24
Minimum count value
Lower
K0
R/W
BFM #25 Upper R/W
BFM #26 Compare results - R
BFM #27 Terminal status - R
BFM #28 Not available - -
BFM #29 Error status - R
BFM #30 Model identification code: K4010 K4010 R
BFM #31 Not available - -
1) 16/32-bit counter modes
a) 32-bit counter modes
(K0, K2, K4, K6, K8, K10)
A 32-bit binary counter which executes UP/
DOWN counting will change from the lower
limit value to the upper limit value or the
upper limit value to the lower limit value
when overflow occurs. Both the upper and
lower limit values are fixed values: the upper
limit value is +2,147,483,647, and the lower
limit value is -2,147,483,648.
b) 16-bit counter modes
(K1, K3, K5, K7, K9, K11)
A 16-bit binary counter handles only positive
values from 0 to 65,535. Changes to zero
from the upper limit value or to the upper
limit value from zero when overflow occurs;
the upper limit value is determined by BFMs
#3 and #2.
2) 2-phase counter [1 edge-count] (K0, K1)
3) 2-phase counter [2 edge-count] (K2, K3)
4) 2-phase counter [4 edge-count] (K4, K5)
5) 1-phase 2-input counter (K6, K7)
If both phase A and phase B inputs are received simultaneously, the counter value
does not change.
6) 1-phase 1-input counter [Hardware UP/DOWN] (K8, K9)
Count modes 32 bits 16 bits Reference
2-phase
input
(phase
difference
pulse)
1 edge count K0 K1 1), 2)
2 edge count K2 K3 1), 3)
4 edge count K4 K5 1), 4)
1-phase 2-input (add/subtract pulse) K6 K7 1), 5)
1-phase
1-input
Hardware UP/DOWN K8 K9 1), 6)
Software UP/DOWN K10 K11 1), 7)
+2,147,483,647
Upper limit value
Lower limit value
-2,147,483,648
0
Ring length
(BFM #3, #2) - 1
0
Phase A
Phase B
Phase B input ON
→
OFF while phase A input
ON Count down by 1.
Phase B input OFF
→
ON while phase A input
ON Count up by 1.
+1+1 -1-1
Phase A
Phase B
Phase B input OFF
→
ON while phase A input
ON Count up by 1.
+1+1
Phase B input ON →
OFF while phase A input
ON Count down by 1.
-1-1
DOWN COUNT
Phase A
Phase B
UP COUNT
+1
+1 +1
+
1-1-1 -1-1
Phase A
Phase B
Phase A input-1
at OFF
→ ON
Phase B input+1
at OFF
→ ON
ON
OFF 10323321
ON
OFF
Phase A
Phase B
Current
value
UP/DOWN is
determined by input
phase A (ON/OFF).
UP DOWN
ONOFF
ON
OFF
7) 1-phase 1-input counter [Software UP/DOWN] (K10, K11)
5.2.2 DOWN/UP command [BFM #1]
When using the 1-phase 1-input counter [Software UP/DOWN] (counter mode: K10,
K11), set the count direction by the current value of BFM #1. (Default value: K0)
→ For the operation, refer to the Subsection 5.2.1 7)
5.2.3 Ring length [BFM #3, #2]
When setting the upper limit value of the 16 bit counters, the setting range is K2 to
K65536. (Default value: K65536)
In this example, K100 is written to BFM #3, #2 of special function block No.2 as 32 bit
data.
When ring length K100 is specified, the current
value of the counter is changed as the right
figure, and upper limit value is set to 99.
5.2.4 Command [BFM #4]
1) When b0 is set to ON and the DISABLE input terminal to OFF, the counter is
permitted to start counting input pulses.
2) Unless b1 is set to ON, YH (hardware compared output) does not turn ON.
3) Unless b2 is set to ON, YS (software compared output) does not turn ON.
4) When b3=ON, YS output is reset if YH output is set, and YH output is reset if YS
output is set. When b3=OFF, YH and YS output act independently, and do not
reset each other.
5) When b4=OFF, preset function by the PRESET input terminal is disabled.
→ For the preset details, refer to Subsection 5.2.5
6) When b8 is set to ON, all error flags are reset.
7) When b9 is set to ON, YH output is reset.
8) When b10 is set to ON, YS output is reset.
9) When b11 is set to ON, YH output is set ON.
10)When b12 is set to ON, YS output is set ON.
Count Direction Setting Value
Up count K0
Down count K1
Bit No.
Setting Value
OFF (0) ON (1)
b0 Count prohibit Count permit
b1 YH output prohibit YH output permit
b2 YS output prohibit YS output permit
b3 YH/YS independent action Mutual reset action
b4 Preset prohibit Preset permit
b5 ~ b7 Not available
b8 No action Error flag reset
b9 No action YH output reset
b10 No action YS output reset
b11 No action YH output set
b12 No action YH output set
b13 ~ b15 Not available
UP/DOWN is
determined by the
contents of BFM #1,
(K0/K1).
BFM #1
Phase B
Current
value
UP DOWN
K1K0
ON
OFF
FNC 79
DTO K100K2 K2 K1
X002
UP
DOWN
10 9899
9998 0 1
Example program
The ON/OFF status of M25 to M10 is written in BFM #4 of special function block
No.2 by the following program, and b15 to b0 action. Among these, b4 to b0 are
always ON as controlled by M10-M14.
Furthermore, b8 (M18), b9 (M19), and b10 (M20) are controlled by the input X004
of the PLC, and X005 by ON/OFF.
5.2.5 Preset data [BFM #11, #10]
When BFM #4 b4 is ON and the PRESET input is switched from OFF to ON,
preset data is stored into BFM #21, #20 (counter current value).
→ For command details, refer to Subsection 5.2.4
5.2.6 YH compare value [BFM #13,#12],
YH compare value [BFM #15,#14]
•After comparing the current value of the
counter with the value written in BFM #13
and #12, BFM #15 and #14, the hardware
and software comparator in the FX2NC-
1HC outputs the comparison result.
•YH, YS output will not turn ON if using
PRESET or the TO instruction to set the
counter value equal to the comparison
value. It will turn ON only when a match
occurs by the counting of input pulses.
However, when BFM #4 b1, b2 are OFF,
it does not set.
•Output occurs when the current value
becomes equal to the compare value but
only if b1 and b2 of BFM #4 are ON.
Once an output is set, it remains ON until
it is reset by b9 or b10 of BFM #4. If b3 of
BFM #4 is ON, however, one of the
outputs is reset when the other is set.
•The YS comparison operation takes
about 300µs, and if a match occurs, the
output goes ON.
5.2.7 Counter current value [BFM #21, #20]
The current value of the counter can be read by the PLC. It will not be the correct
value during high-speed operations because of the communication delay. The
current value of the counter can be forcibly changed by writing a 32-bit value into
the appropriate BFMs from the PLC.
5.2.8 Maximum count value [BFM #23, #22],
Minimum count value [BFM #25, # 24]
These store the maximum and minimum value reached by the counter. If the
power is turned off, the stored data is cleared.
5.2.9 Compare results [BFM #26]
Bit No. Targe t
output OFF (0) ON (1)
b0
YH
Set value ≤current value Set value >current value
b1 Set value ≠current value Set value =current value
b2 Set value ≥current value Set value <current value
b3
YS
Set value ≤current value Set value >current value
b4 Set value ≠current value Set value =current value
b5 Set value ≥current value Set value <current value
b6 ~ b15 Not available
~
FNC 79
DTO K4M10K2 K4 K1
M8000
X004
X005
M8000
M10 M14
Count allowed, YH/YS Output
allowed, Mutual reset,
Preset allowed
RUN
monitor
M18 Error flag reset
M19 M20 YH YS output reset
BFM #4
b9,b10
Setting value
Current value
Coincidence output
Setting value
Current value
BFM #4
b9,b10
Coincidence output
5.2.10 Terminal status [BFM #27]
5.2.11 Error status [BFM #29]
Error status in the FX2NC-1HC can be checked by reading the contents of b0 to b9
of BFM #29 to auxiliary relays of the PLC.
There error flags can be reset by b8 of BFM #4.
5.2.12 Model identification code [BFM #30]
This BFM stores the identification number for FX2NC-1HC.
The identification number for the FX2N-1HC unit is K4010.
By reading this identification number, the user may create built-in checking
routines to check whether the physical position of the FX2NC-1HC matches to that
of the software.
6. Example Program
Please use the following program as a guide whenever you use the FX2NC-1HC
unit. Other instructions to read the current value of the counter, status etc. can be
added as required.
Bit N0. Signal Name OFF (0) ON (1)
b0 PRESET input OFF ON
b1 DISABLE input OFF ON
b2 YH output OFF ON
b 3 YS output OFF ON
b 4 ~ b15 Not available
Bit N0. Error Status
b0 Set when any of b1 to b7 is ON.
b1 Set when the value of the ring length is written incorrectly.
(Except K2 to K65,536)
b2 Set when the preset value is written
incorrectly.
When value ≥ring length in
16-bit counter mode.
b3 Set when the compare value is
written incorrectly.
b4 Set when the current value is
written in correctly.
b5 Set when the counter overflows the
upper limit. When the upper or lower limit
is exceeded on a 32-bit
counter.
b6 Set when the counter overflows the
lower limit.
b7 Set when the FROM/TO command is used incorrectly.
b8 Set when the counter mode
(BFM#0) is written incorrectly. Except K0 to K11
b9 Set when the BFM number is
written incorrectly. Except K0 to K31
b10 ~ b15 Not available
FNC 78
FROM K3M100K2 K29 K1
M8000
M8002
Initial
pulse
FNC 79
TO K11K2 K0 K1
K11 is written into BFM #0 of special function block No.2. The
counter input is 16-bit 1-phase. Please use a pulse command for
this initialization.
FNC 79
DTO K1234K2 K2 K1
K1234 → BFM #3, #2 (special function block No.2)
The ring length can be specified when a 16-bit counter is specified.
FNC 79
TO K1K2 K1 K1
UP/DOWN direction should be specified for 1-phase 1-input
software determined UP/DOWN counter.
FNC 79
DTO K1000K2 K12 K1
K1000 → BFM #13, #12
Set the compare value for YH output.
7. Preliminary checks
1) Check that the I/O wiring and extension cable of the FX2NC-1HC are properly
connected.
2) The FX2NC-1HC occupies 8 points of I/O on the FX2NC, FX3UC expansion bus.
The 8 points can be allocated from either inputs or outputs.
5V DC 90mA power is supplied from the main or extension power supply units
(FX3UC only) for the FX2NC-1HC. Check that there is no power overload from this
and other extension blocks.
3) The following derating curve shows the simultaneous ON ratio of available power
for products connected to the FX2NC-1HC with respect to the ambient
temperature.
Use the adjoined following product within the simultaneous input ON ratio range
shown in the figure.
Target input extension block:FX2NC-16EX, FX2NC-16EX-DS,
FX2NC-32EX, FX2NC-32EX-DS
4) The counter works correctly only when data such as the counter mode (set with a
pulse command), the TO command, the compare value, etc. are appropriately
specified. Remember to initialize the count (BFM #4 b0), preset (BFM #4 b4), and
output (BFM #4 b2, b1) prohibits. Reset the YH/YS outputs before you start.
Note
Note that inputting the pulse higher than the maximum frequency may cause mis-
counting to FX2NC-1HC or a FROM/TO error to the PLC main unit.
~
M8000
M8000
M11 M13
FNC 79
DTO K900K2 K14 K1
K900 → BFM #15, #14
Set the compare value for YS output (not necessary if only YH output is
used).
Count allowed
Output allowed,
Mutual reset
Preset allowed
Error flag reset
YH output reset
YS output reset
Note that counting only occurs if count prohibit is OFF. Also, outputs will not be set from
the counting process at all if the relevant output prohibit are set in the command register.
Please reset the error flags and YH/YS output before you start. The mutual reset and
preset initialization commands can be used as required.
X010
M10
X011
M14
X012
PLS M18
X013
PLS M19
PLS M20
RUN
monitor
FNC 79
TO K4M10K2 K4 K1
FNC 78
DFROM D2K2 K20 K1
(M25 to M10) → BFM #4 (b15 to b0) command
BFM (#21, #20)
→ Reads the current value to the data registers D3 and D2.
Derating curve: FX 2NC -16EX(-DS), FX 2NC -32EX(-DS)
Simultaneous ON ratio
100%
45°C
60%
55°C Ambient temperature
Supply voltage:24V DC
8. Diagnostics
1) The following LEDs on the main panel of the FX2NC-1HC may help you to
troubleshoot the unit.
a) φA, φB:
Goes on/off as φA, φB input turn ON/OFF. It can be checked by rotating the
encoder slowly.
b) UP, DN:
Lights up to indicate whether the counter is going up (UP) or down (DN).
c) PR, DS:
The appropriate LED lights up when the PRESET (PR) terminal or the
DISABLE (DS) terminal is ON.
d) YH, YS:
The appropriate LED lights up when YH/YS output is turned on.
2) You can check the error status by reading the content of BFM #29 to the PLC.
→ For error contents, refer to the Subsection 5.2.11
STARTUP AND MAINTE-
NANCE PRECAUTIONS
•Do not disassemble or modify the PLC.
Doing so may cause fire, equipment failures, or malfunctions.
* For repair, contact your local Mitsubishi Electric distributor.
•Do not drop the product or exert strong impact to it.
Doing so may cause damage.
DISPOSAL
PRECAUTIONS
•Please contact a certified electronic waste disposal company for the
environmentally safe recycling and disposal of your device.
TRANSPORT AND STOR-
AGE PRECAUTIONS
•The product is a precision instrument. During transportation, avoid any impacts.
Failure to do so may cause failures in the product.
After transportation, verify the operations of the product.
9. System Block Diagram
BFM #4 b1
T0 16-bit counter
1-phase
1-input
counter
ØB
ØA
DISABLE
PRESET
Preset data
BFM#11, #10
Model code
BFM #30
Maximum value
BFM #23, #22
Minimum value
BFM #25, #24
Error status
BFM #29
Comparisor data
BFM #13, #12
Comparision data
BFM #15, #14
Compare results
BFM #26
Terminal status
BFM #27
S
R
S
R
YH
YS
ØZ
Direct initialization
Count start
BFM#4 b4
DOWN/UP
Counter
16/32-bit
1-phase/2-phase
Current value
register
BFM #21, #20
Reset
BFM #4 b8
for YH output
Matched
for YS output
Sampling cycle
300
µ s
Comparison is made at the next
sampling point after an input
count.
*1
*1
Matched
BFM #4 b11
BFM #4 b9
BFM #4 b2 BFM #4 b12
BFM #4 b10
Count pulse
T0
T0
BFM #4 b0
T0
T0
BFM #4 b3
Counter mode
BFM #0
Ring upper limit value
BFM #3, #2
DOWN/UP command
BFM #1
Initiali-
zation

This manual confers no industrial property rights or any rights of any other kind,
nor does it confer any patent licenses. Mitsubishi Electric Corporation cannot be
held responsible for any problems involving industrial property rights which may
occur as a result of using the contents noted in this manual.
Warranty
Mitsubishi will not be held liable for damage caused by factors found not to be
the cause of Mitsubishi; opportunity loss or lost profits caused by faults in the
Mitsubishi products; damage, secondary damage, accident compensation
caused by special factors unpredictable by Mitsubishi; damages to products
other than Mitsubishi products; and to other duties.
For safe use
This product has been manufactured as a general-purpose part for general
industries, and has not been designed or manufactured to be incorporated in
a device or system used in purposes related to human life.
Before using the product for special purposes such as nuclear power, electric
power, aerospace, medicine or passenger movement vehicles, consult with
Mitsubishi Electric.
This product has been manufactured under strict quality control. However
when installing the product where major accidents or losses could occur if the
product fails, install appropriate backup or failsafe functions in the system.
•
•
•
HEAD OFFICE
HIMEJI WORKS
: TOKYO BUILDING, 2-7-3 MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310,
JAPAN
: 840, CHIYODA CHO, HIMEJI, JAPAN
5. Buffer Memories (BFM)
5.1 Buffer memory List
Note;
1) When writing in BFM #0 (counter mode), the BFM #1 to #31 will be initialized.
After setting the counter mode (BFM #0), other BFM(s) have to be setup.
When setting the counter mode, use a TOP (pulsed) instruction, or M8002
(initial pulse) to drive the TO instruction.
2) Read/Write of 16 bit data
When using a positive value between K32,768 and K65,535 with 16 bit
counters, read/writes of data, such as the current value, ring length, preset
data, and the YH/YS compare value, should use the 32-bit forms of the
FROM/TO instructions ((D) FROM, (D) TO).
5.2 Details of buffer memories
5.2.1 Counter mode [BFM #0]
The counter mode is shown in the upper right table. (Default value: K0)
Note;
When writing in BFM #0 (counter mode), the BFM #1 to #31 will be initialized.
After setting the counter mode (BFM #0), other BFM(s) have to be setup.
When setting the counter mode, use a TOP (pulsed) instruction, or M8002 (initial
pulse) to drive the TO instruction.
BFM # Description Default BFM
Access
BFM #0 Counter mode (Setting range: K0 to K11) K0 R/W
BFM #1 DOWN/UP command
1-phase 1-input mode (S/W counter) only K0 R/W
BFM #2
Ring length
Lower
K65536
R/W
BFM #3 Upper R/W
BFM #4 Command K0 R/W
BFM #5
~ #9 Not available - -
BFM #10
Preset data
Lower
K0
R/W
BFM #11 Upper R/W
BFM #12
YH compare value
Lower
K32767
R/W
BFM #13 Upper R/W
BFM #14
YS compare value
Lower
K32767
R/W
BFM #15 Upper R/W
BFM #16
~ #19 Not available - -
BFM #20
Counter current value
Lower
K0
R/W
BFM #21 Upper R/W
BFM #22
Maximum count value
Lower
K0
R/W
BFM #23 Upper R/W
BFM #24
Minimum count value
Lower
K0
R/W
BFM #25 Upper R/W
BFM #26 Compare results - R
BFM #27 Terminal status - R
BFM #28 Not available - -
BFM #29 Error status - R
BFM #30 Model identification code: K4010 K4010 R
BFM #31 Not available - -
1) 16/32-bit counter modes
a) 32-bit counter modes
(K0, K2, K4, K6, K8, K10)
A 32-bit binary counter which executes UP/
DOWN counting will change from the lower
limit value to the upper limit value or the
upper limit value to the lower limit value
when overflow occurs. Both the upper and
lower limit values are fixed values: the upper
limit value is +2,147,483,647, and the lower
limit value is -2,147,483,648.
b) 16-bit counter modes
(K1, K3, K5, K7, K9, K11)
A 16-bit binary counter handles only positive
values from 0 to 65,535. Changes to zero
from the upper limit value or to the upper
limit value from zero when overflow occurs;
the upper limit value is determined by BFMs
#3 and #2.
2) 2-phase counter [1 edge-count] (K0, K1)
3) 2-phase counter [2 edge-count] (K2, K3)
4) 2-phase counter [4 edge-count] (K4, K5)
5) 1-phase 2-input counter (K6, K7)
If both phase A and phase B inputs are received simultaneously, the counter value
does not change.
6) 1-phase 1-input counter [Hardware UP/DOWN] (K8, K9)
Count modes 32 bits 16 bits Reference
2-phase
input
(phase
difference
pulse)
1 edge count K0 K1 1), 2)
2 edge count K2 K3 1), 3)
4 edge count K4 K5 1), 4)
1-phase 2-input (add/subtract pulse) K6 K7 1), 5)
1-phase
1-input
Hardware UP/DOWN K8 K9 1), 6)
Software UP/DOWN K10 K11 1), 7)
+2,147,483,647
Upper limit value
Lower limit value
-2,147,483,648
0
Ring length
(BFM #3, #2) - 1
0
Phase A
Phase B
Phase B input ON
→
OFF while phase A input
ON Count down by 1.
Phase B input OFF
→
ON while phase A input
ON Count up by 1.
+1+1 -1-1
Phase A
Phase B
Phase B input OFF
→
ON while phase A input
ON Count up by 1.
+1+1
Phase B input ON →
OFF while phase A input
ON Count down by 1.
-1-1
DOWN COUNT
Phase A
Phase B
UP COUNT
+1
+1 +1
+
1-1-1 -1-1
Phase A
Phase B
Phase A input-1
at OFF
→ ON
Phase B input+1
at OFF
→ ON
ON
OFF 10323321
ON
OFF
Phase A
Phase B
Current
value
UP/DOWN is
determined by input
phase A (ON/OFF).
UP DOWN
ONOFF
ON
OFF
7) 1-phase 1-input counter [Software UP/DOWN] (K10, K11)
5.2.2 DOWN/UP command [BFM #1]
When using the 1-phase 1-input counter [Software UP/DOWN] (counter mode: K10,
K11), set the count direction by the current value of BFM #1. (Default value: K0)
→ For the operation, refer to the Subsection 5.2.1 7)
5.2.3 Ring length [BFM #3, #2]
When setting the upper limit value of the 16 bit counters, the setting range is K2 to
K65536. (Default value: K65536)
In this example, K100 is written to BFM #3, #2 of special function block No.2 as 32 bit
data.
When ring length K100 is specified, the current
value of the counter is changed as the right
figure, and upper limit value is set to 99.
5.2.4 Command [BFM #4]
1) When b0 is set to ON and the DISABLE input terminal to OFF, the counter is
permitted to start counting input pulses.
2) Unless b1 is set to ON, YH (hardware compared output) does not turn ON.
3) Unless b2 is set to ON, YS (software compared output) does not turn ON.
4) When b3=ON, YS output is reset if YH output is set, and YH output is reset if YS
output is set. When b3=OFF, YH and YS output act independently, and do not
reset each other.
5) When b4=OFF, preset function by the PRESET input terminal is disabled.
→ For the preset details, refer to Subsection 5.2.5
6) When b8 is set to ON, all error flags are reset.
7) When b9 is set to ON, YH output is reset.
8) When b10 is set to ON, YS output is reset.
9) When b11 is set to ON, YH output is set ON.
10)When b12 is set to ON, YS output is set ON.
Count Direction Setting Value
Up count K0
Down count K1
Bit No.
Setting Value
OFF (0) ON (1)
b0 Count prohibit Count permit
b1 YH output prohibit YH output permit
b2 YS output prohibit YS output permit
b3 YH/YS independent action Mutual reset action
b4 Preset prohibit Preset permit
b5 ~ b7 Not available
b8 No action Error flag reset
b9 No action YH output reset
b10 No action YS output reset
b11 No action YH output set
b12 No action YH output set
b13 ~ b15 Not available
UP/DOWN is
determined by the
contents of BFM #1,
(K0/K1).
BFM #1
Phase B
Current
value
UP DOWN
K1K0
ON
OFF
FNC 79
DTO K100K2 K2 K1
X002
UP
DOWN
10 9899
9998 0 1
Example program
The ON/OFF status of M25 to M10 is written in BFM #4 of special function block
No.2 by the following program, and b15 to b0 action. Among these, b4 to b0 are
always ON as controlled by M10-M14.
Furthermore, b8 (M18), b9 (M19), and b10 (M20) are controlled by the input X004
of the PLC, and X005 by ON/OFF.
5.2.5 Preset data [BFM #11, #10]
When BFM #4 b4 is ON and the PRESET input is switched from OFF to ON,
preset data is stored into BFM #21, #20 (counter current value).
→ For command details, refer to Subsection 5.2.4
5.2.6 YH compare value [BFM #13,#12],
YH compare value [BFM #15,#14]
•After comparing the current value of the
counter with the value written in BFM #13
and #12, BFM #15 and #14, the hardware
and software comparator in the FX2NC-
1HC outputs the comparison result.
•YH, YS output will not turn ON if using
PRESET or the TO instruction to set the
counter value equal to the comparison
value. It will turn ON only when a match
occurs by the counting of input pulses.
However, when BFM #4 b1, b2 are OFF,
it does not set.
•Output occurs when the current value
becomes equal to the compare value but
only if b1 and b2 of BFM #4 are ON.
Once an output is set, it remains ON until
it is reset by b9 or b10 of BFM #4. If b3 of
BFM #4 is ON, however, one of the
outputs is reset when the other is set.
•The YS comparison operation takes
about 300µs, and if a match occurs, the
output goes ON.
5.2.7 Counter current value [BFM #21, #20]
The current value of the counter can be read by the PLC. It will not be the correct
value during high-speed operations because of the communication delay. The
current value of the counter can be forcibly changed by writing a 32-bit value into
the appropriate BFMs from the PLC.
5.2.8 Maximum count value [BFM #23, #22],
Minimum count value [BFM #25, # 24]
These store the maximum and minimum value reached by the counter. If the
power is turned off, the stored data is cleared.
5.2.9 Compare results [BFM #26]
Bit No. Targe t
output OFF (0) ON (1)
b0
YH
Set value ≤current value Set value >current value
b1 Set value ≠current value Set value =current value
b2 Set value ≥current value Set value <current value
b3
YS
Set value ≤current value Set value >current value
b4 Set value ≠current value Set value =current value
b5 Set value ≥current value Set value <current value
b6 ~ b15 Not available
~
FNC 79
DTO K4M10K2 K4 K1
M8000
X004
X005
M8000
M10 M14
Count allowed, YH/YS Output
allowed, Mutual reset,
Preset allowed
RUN
monitor
M18 Error flag reset
M19 M20 YH YS output reset
BFM #4
b9,b10
Setting value
Current value
Coincidence output
Setting value
Current value
BFM #4
b9,b10
Coincidence output
5.2.10 Terminal status [BFM #27]
5.2.11 Error status [BFM #29]
Error status in the FX2NC-1HC can be checked by reading the contents of b0 to b9
of BFM #29 to auxiliary relays of the PLC.
There error flags can be reset by b8 of BFM #4.
5.2.12 Model identification code [BFM #30]
This BFM stores the identification number for FX2NC-1HC.
The identification number for the FX2N-1HC unit is K4010.
By reading this identification number, the user may create built-in checking
routines to check whether the physical position of the FX2NC-1HC matches to that
of the software.
6. Example Program
Please use the following program as a guide whenever you use the FX2NC-1HC
unit. Other instructions to read the current value of the counter, status etc. can be
added as required.
Bit N0. Signal Name OFF (0) ON (1)
b0 PRESET input OFF ON
b1 DISABLE input OFF ON
b2 YH output OFF ON
b 3 YS output OFF ON
b 4 ~ b15 Not available
Bit N0. Error Status
b0 Set when any of b1 to b7 is ON.
b1 Set when the value of the ring length is written incorrectly.
(Except K2 to K65,536)
b2 Set when the preset value is written
incorrectly.
When value ≥ring length in
16-bit counter mode.
b3 Set when the compare value is
written incorrectly.
b4 Set when the current value is
written in correctly.
b5 Set when the counter overflows the
upper limit. When the upper or lower limit
is exceeded on a 32-bit
counter.
b6 Set when the counter overflows the
lower limit.
b7 Set when the FROM/TO command is used incorrectly.
b8 Set when the counter mode
(BFM#0) is written incorrectly. Except K0 to K11
b9 Set when the BFM number is
written incorrectly. Except K0 to K31
b10 ~ b15 Not available
FNC 78
FROM K3M100K2 K29 K1
M8000
M8002
Initial
pulse
FNC 79
TO K11K2 K0 K1
K11 is written into BFM #0 of special function block No.2. The
counter input is 16-bit 1-phase. Please use a pulse command for
this initialization.
FNC 79
DTO K1234K2 K2 K1
K1234 → BFM #3, #2 (special function block No.2)
The ring length can be specified when a 16-bit counter is specified.
FNC 79
TO K1K2 K1 K1
UP/DOWN direction should be specified for 1-phase 1-input
software determined UP/DOWN counter.
FNC 79
DTO K1000K2 K12 K1
K1000 → BFM #13, #12
Set the compare value for YH output.
7. Preliminary checks
1) Check that the I/O wiring and extension cable of the FX2NC-1HC are properly
connected.
2) The FX2NC-1HC occupies 8 points of I/O on the FX2NC, FX3UC expansion bus.
The 8 points can be allocated from either inputs or outputs.
5V DC 90mA power is supplied from the main or extension power supply units
(FX3UC only) for the FX2NC-1HC. Check that there is no power overload from this
and other extension blocks.
3) The following derating curve shows the simultaneous ON ratio of available power
for products connected to the FX2NC-1HC with respect to the ambient
temperature.
Use the adjoined following product within the simultaneous input ON ratio range
shown in the figure.
Target input extension block:FX2NC-16EX, FX2NC-16EX-DS,
FX2NC-32EX, FX2NC-32EX-DS
4) The counter works correctly only when data such as the counter mode (set with a
pulse command), the TO command, the compare value, etc. are appropriately
specified. Remember to initialize the count (BFM #4 b0), preset (BFM #4 b4), and
output (BFM #4 b2, b1) prohibits. Reset the YH/YS outputs before you start.
Note
Note that inputting the pulse higher than the maximum frequency may cause mis-
counting to FX2NC-1HC or a FROM/TO error to the PLC main unit.
~
M8000
M8000
M11 M13
FNC 79
DTO K900K2 K14 K1
K900 → BFM #15, #14
Set the compare value for YS output (not necessary if only YH output is
used).
Count allowed
Output allowed,
Mutual reset
Preset allowed
Error flag reset
YH output reset
YS output reset
Note that counting only occurs if count prohibit is OFF. Also, outputs will not be set from
the counting process at all if the relevant output prohibit are set in the command register.
Please reset the error flags and YH/YS output before you start. The mutual reset and
preset initialization commands can be used as required.
X010
M10
X011
M14
X012
PLS M18
X013
PLS M19
PLS M20
RUN
monitor
FNC 79
TO K4M10K2 K4 K1
FNC 78
DFROM D2K2 K20 K1
(M25 to M10) → BFM #4 (b15 to b0) command
BFM (#21, #20)
→ Reads the current value to the data registers D3 and D2.
Derating curve: FX 2NC -16EX(-DS), FX 2NC -32EX(-DS)
Simultaneous ON ratio
100%
45°C
60%
55°C Ambient temperature
Supply voltage:24V DC
8. Diagnostics
1) The following LEDs on the main panel of the FX2NC-1HC may help you to
troubleshoot the unit.
a) φA, φB:
Goes on/off as φA, φB input turn ON/OFF. It can be checked by rotating the
encoder slowly.
b) UP, DN:
Lights up to indicate whether the counter is going up (UP) or down (DN).
c) PR, DS:
The appropriate LED lights up when the PRESET (PR) terminal or the
DISABLE (DS) terminal is ON.
d) YH, YS:
The appropriate LED lights up when YH/YS output is turned on.
2) You can check the error status by reading the content of BFM #29 to the PLC.
→ For error contents, refer to the Subsection 5.2.11
STARTUP AND MAINTE-
NANCE PRECAUTIONS
•Do not disassemble or modify the PLC.
Doing so may cause fire, equipment failures, or malfunctions.
* For repair, contact your local Mitsubishi Electric distributor.
•Do not drop the product or exert strong impact to it.
Doing so may cause damage.
DISPOSAL
PRECAUTIONS
•Please contact a certified electronic waste disposal company for the
environmentally safe recycling and disposal of your device.
TRANSPORT AND STOR-
AGE PRECAUTIONS
•The product is a precision instrument. During transportation, avoid any impacts.
Failure to do so may cause failures in the product.
After transportation, verify the operations of the product.
9. System Block Diagram
BFM #4 b1
T0 16-bit counter
1-phase
1-input
counter
ØB
ØA
DISABLE
PRESET
Preset data
BFM#11, #10
Model code
BFM #30
Maximum value
BFM #23, #22
Minimum value
BFM #25, #24
Error status
BFM #29
Comparisor data
BFM #13, #12
Comparision data
BFM #15, #14
Compare results
BFM #26
Terminal status
BFM #27
S
R
S
R
YH
YS
ØZ
Direct initialization
Count start
BFM#4 b4
DOWN/UP
Counter
16/32-bit
1-phase/2-phase
Current value
register
BFM #21, #20
Reset
BFM #4 b8
for YH output
Matched
for YS output
Sampling cycle
300
µ s
Comparison is made at the next
sampling point after an input
count.
*1
*1
Matched
BFM #4 b11
BFM #4 b9
BFM #4 b2 BFM #4 b12
BFM #4 b10
Count pulse
T0
T0
BFM #4 b0
T0
T0
BFM #4 b3
Counter mode
BFM #0
Ring upper limit value
BFM #3, #2
DOWN/UP command
BFM #1
Initiali-
zation

JY997D30701A
Safety Precaution (Read these precautions before use.)
This manual classifies the safety precautions into two categories:
and .
Depending on the circumstances, procedures indicated by may
also cause severe injury.
It is important to follow all precautions for personal safety.
Associated Manuals
How to obtain manuals
For product manuals or documents, consult with the Mitsubishi Electric dealer
from who you purchased your product.
Indicates that incorrect handling may cause hazardous
conditions, resulting in death or severe injury.
Indicates that incorrect handling may cause hazardous
conditions, resulting in medium or slight personal injury
or physical damage.
Manual name Manual No. Description
FX3UC Series
User’s Manual
- Hardware Edition
JY997D28701
MODEL CODE:
09R519
Explains the FX3UC Series PLC
specifications for I/O, wiring,
installation, and maintenance.
FX3U/FX3UC Series
Programming Manual
- Basic & Applied
Instruction Edition
JY997D16601
MODEL CODE:
09R517
Describes FX3U/FX3UC Series PLC
programming for basic/applied
instructions and devices.
FX2NC (DSS/DS) Series
Hardware Manual
JY992D76401
MODEL CODE:
09R509
Explains the FX2NC (DSS/DS)
Series PLC specifications for I/O,
wiring, installation, and
maintenance.
FX2NC (D/UL) Series
Hardware Manual JY992D87201
Explains the FX2NC (D/UL) Series
PLC specifications for I/O, wiring,
installation, and maintenance.
FX Series
Programming Manual II
JY992D88101
MODEL CODE:
09R512
Describes FX1S/FX1N/FX2N/FX2NC
Series PLC programming for basic/
applied instructions and devices.
Certification of UL, cUL standards
The following product has UL and cUL certification.
UL, cUL File Number:E95239
Models: MELSEC FX2NC series manufactured
from December 1st, 2007 FX2NC-1HC
Compliance with EC directive (CE Marking)
This note does not guarantee that an entire mechanical module produced in
accordance with the contents of this note will comply with the following standards.
Compliance to EMC directive and LVD directive for the entire mechanical module
should be checked by the user / manufacturer. For more details please contact the
local Mitsubishi Electric sales site.
Requirement for Compliance with EMC directive
The following products have shown compliance through direct testing (of the identified
standards below) and design analysis (through the creation of a technical construction
file) to the European Directive for Electromagnetic Compatibility (89/336/EEC) when
used as directed by the appropriate documentation.
Type: Programmable Controller (Open Type Equipment)
Models: MELSEC FX2NC series manufactured
from December 1st, 2007 FX2NC-1HC
1. Outline
The hardware high-speed counter block is a 2-phase 50 kHz high-speed counter. It is a
special function block for the FX2NC, FX3UC series PLC.
•FROM/TO instruction transfers the PLC data (i.e. parameters, comparing value and
present value).
•The FX2NC-1HC occupies 8 points of I/O on the FX2NC, FX3UC expansion bus. The
8 points can be allocated from either inputs or outputs.
However, 5V DC 90mA power is supplied from the main unit or extension power
supply units. There must be no power overload from this or any other extension unit.
Furthermore, another power supply is needed for the output circuit of the encoder or
the transistor.
•Differential-Line-Driver (AM26C31 or equivalent) and open collector output
encoders are available for FX2NC-1HC.
•The source of your input signal should be a 1 or 2 phase encoder. A 5V, 12V, or 24V
power source can be used. An initial value setting command input (PRESET) and a
count prohibit command input (DISABLE) are also available.
•The FX2NC-1HC has two outputs. When the counter value coincides with an output
compare value, the appropriate output is set ON. The output transistors are
individually isolated to allow either sink or source connection methods.
•Various counter modes, such as 1-phase or 2-phase, 16-bit or 32-bit modes, can be
selected using commands from the PLC. Allow the FX2NC-1HC unit to run only after
setting these mode parameters.
1.1 Incorporated Items
Verify that the following product and items are included in the packag e:
Standard Remark
EN61131-2:2003
Programmable controllers
- Equipment requirements and
tests
Compliance with all relevant aspects of the
standard.
EMI
• Radiated Emissions
• Mains Terminal Voltage Emissions
EMS
• RF immunity
• Fast Transients
• ESD
• Surge
• Conducted
• Power magnetic fields
Included Items
FX2NC-1HC 1 Unit
Special unit/block No. label 1 Sheet
Manuals [Japanese version, English version] 1 manual each
1.2 External Dimensions, Part Names, and Terminal Layout
No. Name
c
Status LED
PW
(Green)
Power LED
ON when the 5V power supply is normally supplied from the
PLC.
UP (Red) Up count LED The respective LED is ON according to up/
down count direction of the counter.
DN (Red) Down count LED
φA A phase input The respective LED is ON (flicker) according
to ON/OFF of φA and φB input.
φB B phase input
DS DISABLE input
LED The respective LED is ON/OFF according to
ON/OFF of PRESET and DISABLE input.
PR PRESET input
LED
YH YH output LED The respective LED is ON/OFF according to
status of YH and YS output.
YS YS output LED
dTerminal block (European type)
e
Extension connector (PLC side)
Used to connect this special function block to the FX2NC, FX3UC main unit or
extension block.
f
Slide lock
Used to fix the FX2NC extension block on the right side of this special function
block.
g
Extension connector (Extension side)
Used to connect the FX2NC extension block to the right of this special function
block. Remove this cover for connecting.
hDIN rail mounting hook
PW
FX -1HC
2NC
φ A
DS
A24+A12+
A5+
A-
B24+B12+B5+
B-
XD5COMDXP24
XP5
COMPYH-YS+
YS-
UP
DN
φ B
PR
YH
YS
XD24YH+
A24+
A12+
A5+
A-
B24+
B12+
B5+
B-
XD5
COMD
XP24
XP5
COMP
YH-
YS+
YS-
XD24
YH+
90(3.55")
20.2
(0.8") 74(2.92")
15
(0.6")
Weight: Approx. 0.13kg (0.29lbs)
(Includes terminal block)
Dimensions: mm (inches) Terminal layout
3
6
5
2
1 4
A phase
input
B phase
input
DISABLE
input
PRESET
input
YH
output
YS
output
2. Installation, Connect to the PLC
2.1 Installation
The FX 2NC -1HC can be installed on a DIN46277 rail (35 mm (1.38") wide).
2.2 Number of the connectable units
1) FX2NC PLC
Up to four special function units/blocks in total can be connected to the
FX2NC Series PLC including those connected to the FX2NC-CNV-IF.
2) FX3UC PLC
Up to eight special function units/blocks in total can be connected to the
FX3UC*1 Series PLC including those connected to the FX2NC-CNV-IF or
FX3UC-1PS-5V.
*1 Up to seven special function units/blocks in total can be connected to the
FX3UC-32MT-LT PLC. Unit numbers assigned to special function units/
blocks begins with No.1.
2.3 Connection to the PLC
When connecting
the FX2NC-1HC to
the FX2NC / FX3UC
Series main unit or
extension block,
remove the
extension port
cover from the right
side of the main
unit or extension
block, keep the
slide lock in the
main unit or
extension block
pulled upward,
then align the hook
in the FX2NC-1HC with the mounting hole in the former step of the main unit or
extension block.
Then push the slide lock downward to fix the FX2NC-1HC. When connecting two
or more FX2NC-1HC units, connect an FX2NC-1HC unit to another FX2NC-1HC
unit in the same way.
3. Wiring (Power supply and analog input)
INSTALLATION
PRECAUTIONS
•Make sure to cut off all phases of the power supply externally before
attempting installation or wiring work.
Failure to do so may cause electric shock or damage to the product.
INSTALLATION
PRECAUTIONS
•Use the product within the generic environment specifications described in PLC
main unit manual.
Never use the product in areas with excessive dust, oily smoke, conductive
dusts, corrosive gas (salt air, Cl2, H2S, SO2, or NO2), flammable gas, vibration
or impacts, or expose it to high temperature, condensation, or rain and wind.
If the product is used in such conditions, electric shock, fire, malfunctions,
deterioration or damage may occur.
•When drilling screw holes or wiring, make sure cutting or wire debris does
not enter the ventilation slits.
Failure to do so may cause fire, equipment failures or malfunctions.
•Connect FX2NC-1HC securely to their designated connectors.
Loose connections may cause malfunctions.
•Use screwdrivers carefully when performing installation work, thus avoiding
accident or product damage.
WIRING
PRECAUTIONS
•Make sure to cut off all phases of the power supply externally before
attempting installation or wiring work.
Failure to do so may cause electric shock or damage to the product.
WIRING
PRECAUTIONS
•Make sure to cut off all phases of the power supply externally before
attempting installation or wiring work.
Failure to do so may cause electric shock or damage to the product.
hook
hook
Main unit
FX
2NC -1HC
3.1 Wire and Terminal Tightening Torque
3.1.1 Cable
1) Applicable cable
2) Termination
Strip the coating of strand wire and twist the cable core before connecting it,
or strip the coating of single wire before connecting it. An alternative
connection is to use a ferrule with insulating sleeve.
•Stranded wire/solid wire •Bar terminal with insulating sleeve
When using a stick terminal with an insulating sleeve, choose a wire with
proper cable sheath referring to the above outside dimensions, otherwise the
wire cannot be inserted easily.
3.1.2 Tightening Torque
Tightening torque should be between 0.22 and 0.25 N•m.
Tool
To tighten terminals, use a purchased
small-sized screwdriver whose head is
straight and is not widened as shown in
the right figure.
Note:
If the diameter of screwdriver grip is too
small, tightening torque will not be able
to be achieved. Use the following recommended screwdriver or an appropriate
replacement (grip diameter: approximately 25mm).
3.2 Wiring
Note;
Make sure to properly wire in accordance with the encoder output specifications.
Incorrect wiring may cause accidents or damage to the product.
•Make sure to observe the following precautions in order to prevent any
damage to the machinery or accidents due to abnormal data written to the
PLC under the influence of noise:
1) Do not bundle the main circuit line together with or lay it close to the main
circuit, high-voltage line or load line.
Otherwise, noise disturbance and/or surge induction are likely to take
place. As a guideline, lay the control line at least 100mm (3.94") or more
away from the main circuit or high-voltage lines.
2) Ground the shield wire or shield of the shielded cable at one point on the
PLC. However, do not use common grounding with heavy electrical
systems.
•Make sure to properly wire to the European terminal board in accordance
with the following precautions.
Failure to do so may cause electric shock, a short-circuit, wire breakage, or
damage to the product.
- The disposal size of the cable end should follow the dimensions described
by the this manual.
- Tightening torque should follow the specifications by the this manual.
- Twist the end of strand wire and make sure that there are no loose wires.
- Do not solder-plate the electric wire ends.
- Do not connect more than the specified number of wires or electric wires
of unspecified size.
- Affix the electric wires so that neither the terminal block nor the connected
parts are directly stressed.
Typ e Wire size
Single wire 0.3mm2to 0.5mm2(AWG22 to 20)
Double wire 0.3mm2(AWG22)*2
Manufacturer Model Pressure bonding tool
Phoenix Contact AI 0.5-8WH CRIMPFOX ZA 3
(or CRIMPFOX UD 6)
Manufacturer Model
Phoenix Contact SZS 0.4×2.5
WIRING
PRECAUTIONS
9mm
(0.36")
Termination of
cable end
8mm
(0.32")
Contact area
(Crimp area)
14mm(0.56")
2.6mm
(0.11")
Insulating sleeve
0.4mm
(0.02")
2.5mm
(0.1")
With
straight tip
3.2.1 NPN output encoders
3.2.2 PNP output encoders
*1. Drive power supply of the encoder.
Use either 24V DC, 12V DC, or 5V DC according to the encoder type.
When connecting the A phase, the B phase, and the Z phase to FX
2NC -1HC,
connect to the power supply terminal.
When using 24V DC for PRESET and DISABLE signals, connect to the 24V
DC (XP24, XD24) terminal.
*3. This wiring is unnecessary when not using the PRESET function and the
DISABLE function.
Encoder (NPN)
+24V
0V
DC24V
*1
*1
Phase
B
Phase
Z
Phase
A
Class D
*2
Shielded
Twisted-Pair
Shielded
Twisted-Pair
PRESET
*3
DISABLE
*3
A24+
A12+
A 5+
A -
3.3k
1.5k
0.27k
0.1k
B24+
A12+
B 5+
B -
3.3k
1.5k
0.27k
0.1k
XD24
XD 5
COMD
1.5k
0.5k
0.2k
XP24
XP 5
COMP
1.5k
0.5k
0.2k
FX 2NC -1HC
FX 2NC
FX 3UC
*1
*1
*1
*2. Grounding resistance 100 Ω or less.
*1
Encoder (PNP)
+24V
0V
DC24V
*1
*1
Phase
B
Phase
Z
Class D
*2
Shielded
Twisted-Pair
Shielded
Twisted-Pair
PRESET
*3
DISABLE
*3
A24+
A12+
A 5+
A -
3.3k
1.5k
0.27k
0.1k
B24+
A12+
B 5+
B -
3.3k
1.5k
0.27k
0.1k
XD24
XD 5
COMD
1.5k
0.5k
0.2k
XP24
XP 5
COMP
1.5k
0.5k
0.2k
FX 2NC -1HC
FX 2NC
FX 3UC
Phase
A
*1
*1
*1
*1
*1. Drive power supply of the encoder.
Use either 24V DC, 12V DC, or 5V DC according to the encoder type.
When connecting the A phase, the B phase, and the Z phase to FX
2NC -1HC,
connect to the power supply terminal.
When using 24V DC for PRESET and DISABLE signals, connect to the 24V
DC (XP24, XD24) terminal.
*3. This wiring is unnecessary when not using the PRESET function and the
DISABLE function.
*2. Grounding resistance 100 Ω or less.
3.2.3 Differential-Line-Driver output encoders
When applying the Differential-Line-Driver encoder (AM26C31 or equivalent) to
FX2NC-1HC, connect the encoder output with the 5V DC terminal as shown in the left
figure.
3.2.4 YH, YS output wiring [Sink wiring]
3.2.5 YH, YS output wiring [Source wiring]
4. Specifications
DESIGN
PRECAUTIONS
•Make sure to have the following safety circuits outside of the PLC to ensure safe
system operation even during external power supply problems or PLC failure.
Otherwise, malfunctions may cause serious accidents.
1) Most importantly, have the following: an emergency stop circuit, a protection
circuit, an interlock circuit for opposite movements (such as normal vs.
reverse rotation), and an interlock circuit (to prevent damage to the
equipment at the upper and lower positioning limits).
2) Note that when the PLC CPU detects an error, such as a watchdog timer
error, during self-diagnosis, all outputs are turned off. Also, when an error that
cannot be detected by the PLC CPU occurs in an input/output control block,
output control may be disabled.
External circuits and mechanisms should be designed to ensure safe
machinery operation in such a case.
3) Note that when an error occurs in a relay, triac or transistor output device, the
output could be held either on or off.
For output signals that may lead to serious accidents, external circuits and
mechanisms should be designed to ensure safe machinery operation in such
a case.
DESIGN
PRECAUTIONS
•Do not bundle the control line together with or lay it close to the main circuit or
power line. As a guideline, lay the control line at least 100mm (3.94") or more
away from the main circuit or power line.
Noise may cause malfunctions.
Encoder
Class D
*1
Shielded
Twisted-Pair
FX 2NC -1HC
FX 2NC
FX 3UC
A 5+
A -
0.27k
0.1k
B 5+
B -
0.27k
0.1k
XD 5
COMD
0.5k
0.2k
+5V
0V
DC5V
LA
LAR
LBR
LB
XP 5
COMP
0.5k
0.2k
PRESET
*2
Shielded
Twisted-Pair
*1. Grounding resistance 100 Ω or less.
*2. This wiring is unnecessary when not using the PRESET function and the
DISABLE function.
DISABLE
*2
YH+
YH-
YS+
YS-
Output load driving
power, 5 - 24V DC
FX 2NC -1HC
Fuse
YH+
YH-
YS+
YS-
Output load
driving power,
5 - 24V DC
FX 2NC -1HC
Fuse
4.1 General Specifications
The general specifications are equivalent to the PLC main unit.
(For general specifications, refer to the manual of the PLC main unit.)
4.2 Power Supply Specifications
4.3 Performance Specifications
Item Specifications
Units driving power 5V DC, 90mA (Internal power supply from main unit or
extension power supply unit)
Item Specification
Input
signal
Signal
level
(Selected
by terminal
connec-
tion)
Phase A,
Phase B
[A24+],
[B24+]
24V DC±10%,
7mA or less
[A12+],
[B12+]
12V DC±10%,
7mA or less
[A5+],
[B5+]
3.0V to 5.5V DC,
12.5mA or less
PRESET,
DISABLE
[XP24],
[XD24]
10.8V to 26.4V DC,
15mA or less
[XP5],
[XD5]
5V DC±10%,
8mA or less
MAX.
frequency
1-phase
input
1 input
50kHz2 input
2-phase
input
1 edge count
2 edge count 25kHz
4 edge count 12.5kHz
Pulse
shape
t1(Rise/fall time): 3µs or less
t2(ON/OFF pulse): 6µs or more (at 50kHz)
t3(Phase difference between A and B):
3.5µs or more (at 50kHz)
PRESET(Z phase) input 100µs or more
DISABLE (count prohibit) input 100µs or more
Count-
ing spec-
ification
Format
Automatic UP/DOWN
However, when on 1-phase 1-input mode, UP/
DOWN is determined below.
•Hardware UP/DOWN:
Up/down count is decided by OFF/ON of the A-
phase input terminal.
•Software UP/DOWN:
Up/down count is decided by the current value
(K0/K1) of BFM #1.
Range
When 32-bit is specified:
-2,147,483,648 to +2,147,483,647
When 16-bit is specified: 0 to 65,535
(upper limit is set up by BFM #3, #2.)
Compari-
son Type
Each output is set when the present value of the
counter matches with the compare value, and is
switched OFF by a reset command.
YH: Direct output processed by hardware.
YS: Software processed output with worst delay
time of 300µs.
Therefore, when the input frequency is 50 kHz,
there is a worst case delay of 15 input pulses.
Output
signal
Types of
outputs
YH +: transistor output for
YH output
YH -: transistor output for
YH output
YS +: transistor output for
YS output
YS -: transistor output for YS output
Output
capacity 5V ~ 24V DC, 0.5A
I/O occupation 8 points (can be either inputs or outputs)
t1 t1
t2 t2
t3
t3
YH+,
YS+
YH-,
YS-
FX2NC-1HC
USER’S MANUAL
This manual describes the part names, dimensions, mounting, wiring, and
specifications of the product. Before use, read this manual and the manuals of
all relevant products fully to acquire proficiency in handling and operating the
product. Make sure to learn all the product information, safety information, and
precautions.
Store this manual in a safe place so that it can be taken out and read whenever
necessary. Always forward it to the end user.
Registration:
The company and product names described in this manual are registered
trademarks or the trademarks of their respective companies.
Effective December 2007
Specifications are subject to change without notice.
©2007 Mitsubishi Electric Corporation
Manual Number JY997D30701
Revision A
Date December 2007

This manual confers no industrial property rights or any rights of any other kind,
nor does it confer any patent licenses. Mitsubishi Electric Corporation cannot be
held responsible for any problems involving industrial property rights which may
occur as a result of using the contents noted in this manual.
Warranty
Mitsubishi will not be held liable for damage caused by factors found not to be
the cause of Mitsubishi; opportunity loss or lost profits caused by faults in the
Mitsubishi products; damage, secondary damage, accident compensation
caused by special factors unpredictable by Mitsubishi; damages to products
other than Mitsubishi products; and to other duties.
For safe use
This product has been manufactured as a general-purpose part for general
industries, and has not been designed or manufactured to be incorporated in
a device or system used in purposes related to human life.
Before using the product for special purposes such as nuclear power, electric
power, aerospace, medicine or passenger movement vehicles, consult with
Mitsubishi Electric.
This product has been manufactured under strict quality control. However
when installing the product where major accidents or losses could occur if the
product fails, install appropriate backup or failsafe functions in the system.
•
•
•
HEAD OFFICE
HIMEJI WORKS
: TOKYO BUILDING, 2-7-3 MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310,
JAPAN
: 840, CHIYODA CHO, HIMEJI, JAPAN
5. Buffer Memories (BFM)
5.1 Buffer memory List
Note;
1) When writing in BFM #0 (counter mode), the BFM #1 to #31 will be initialized.
After setting the counter mode (BFM #0), other BFM(s) have to be setup.
When setting the counter mode, use a TOP (pulsed) instruction, or M8002
(initial pulse) to drive the TO instruction.
2) Read/Write of 16 bit data
When using a positive value between K32,768 and K65,535 with 16 bit
counters, read/writes of data, such as the current value, ring length, preset
data, and the YH/YS compare value, should use the 32-bit forms of the
FROM/TO instructions ((D) FROM, (D) TO).
5.2 Details of buffer memories
5.2.1 Counter mode [BFM #0]
The counter mode is shown in the upper right table. (Default value: K0)
Note;
When writing in BFM #0 (counter mode), the BFM #1 to #31 will be initialized.
After setting the counter mode (BFM #0), other BFM(s) have to be setup.
When setting the counter mode, use a TOP (pulsed) instruction, or M8002 (initial
pulse) to drive the TO instruction.
BFM # Description Default BFM
Access
BFM #0 Counter mode (Setting range: K0 to K11) K0 R/W
BFM #1 DOWN/UP command
1-phase 1-input mode (S/W counter) only K0 R/W
BFM #2
Ring length
Lower
K65536
R/W
BFM #3 Upper R/W
BFM #4 Command K0 R/W
BFM #5
~ #9 Not available - -
BFM #10
Preset data
Lower
K0
R/W
BFM #11 Upper R/W
BFM #12
YH compare value
Lower
K32767
R/W
BFM #13 Upper R/W
BFM #14
YS compare value
Lower
K32767
R/W
BFM #15 Upper R/W
BFM #16
~ #19 Not available - -
BFM #20
Counter current value
Lower
K0
R/W
BFM #21 Upper R/W
BFM #22
Maximum count value
Lower
K0
R/W
BFM #23 Upper R/W
BFM #24
Minimum count value
Lower
K0
R/W
BFM #25 Upper R/W
BFM #26 Compare results - R
BFM #27 Terminal status - R
BFM #28 Not available - -
BFM #29 Error status - R
BFM #30 Model identification code: K4010 K4010 R
BFM #31 Not available - -
1) 16/32-bit counter modes
a) 32-bit counter modes
(K0, K2, K4, K6, K8, K10)
A 32-bit binary counter which executes UP/
DOWN counting will change from the lower
limit value to the upper limit value or the
upper limit value to the lower limit value
when overflow occurs. Both the upper and
lower limit values are fixed values: the upper
limit value is +2,147,483,647, and the lower
limit value is -2,147,483,648.
b) 16-bit counter modes
(K1, K3, K5, K7, K9, K11)
A 16-bit binary counter handles only positive
values from 0 to 65,535. Changes to zero
from the upper limit value or to the upper
limit value from zero when overflow occurs;
the upper limit value is determined by BFMs
#3 and #2.
2) 2-phase counter [1 edge-count] (K0, K1)
3) 2-phase counter [2 edge-count] (K2, K3)
4) 2-phase counter [4 edge-count] (K4, K5)
5) 1-phase 2-input counter (K6, K7)
If both phase A and phase B inputs are received simultaneously, the counter value
does not change.
6) 1-phase 1-input counter [Hardware UP/DOWN] (K8, K9)
Count modes 32 bits 16 bits Reference
2-phase
input
(phase
difference
pulse)
1 edge count K0 K1 1), 2)
2 edge count K2 K3 1), 3)
4 edge count K4 K5 1), 4)
1-phase 2-input (add/subtract pulse) K6 K7 1), 5)
1-phase
1-input
Hardware UP/DOWN K8 K9 1), 6)
Software UP/DOWN K10 K11 1), 7)
+2,147,483,647
Upper limit value
Lower limit value
-2,147,483,648
0
Ring length
(BFM #3, #2) - 1
0
Phase A
Phase B
Phase B input ON
→
OFF while phase A input
ON Count down by 1.
Phase B input OFF
→
ON while phase A input
ON Count up by 1.
+1+1 -1-1
Phase A
Phase B
Phase B input OFF
→
ON while phase A input
ON Count up by 1.
+1+1
Phase B input ON →
OFF while phase A input
ON Count down by 1.
-1-1
DOWN COUNT
Phase A
Phase B
UP COUNT
+1
+1 +1
+
1-1-1 -1-1
Phase A
Phase B
Phase A input-1
at OFF
→ ON
Phase B input+1
at OFF
→ ON
ON
OFF 10323321
ON
OFF
Phase A
Phase B
Current
value
UP/DOWN is
determined by input
phase A (ON/OFF).
UP DOWN
ONOFF
ON
OFF
7) 1-phase 1-input counter [Software UP/DOWN] (K10, K11)
5.2.2 DOWN/UP command [BFM #1]
When using the 1-phase 1-input counter [Software UP/DOWN] (counter mode: K10,
K11), set the count direction by the current value of BFM #1. (Default value: K0)
→ For the operation, refer to the Subsection 5.2.1 7)
5.2.3 Ring length [BFM #3, #2]
When setting the upper limit value of the 16 bit counters, the setting range is K2 to
K65536. (Default value: K65536)
In this example, K100 is written to BFM #3, #2 of special function block No.2 as 32 bit
data.
When ring length K100 is specified, the current
value of the counter is changed as the right
figure, and upper limit value is set to 99.
5.2.4 Command [BFM #4]
1) When b0 is set to ON and the DISABLE input terminal to OFF, the counter is
permitted to start counting input pulses.
2) Unless b1 is set to ON, YH (hardware compared output) does not turn ON.
3) Unless b2 is set to ON, YS (software compared output) does not turn ON.
4) When b3=ON, YS output is reset if YH output is set, and YH output is reset if YS
output is set. When b3=OFF, YH and YS output act independently, and do not
reset each other.
5) When b4=OFF, preset function by the PRESET input terminal is disabled.
→ For the preset details, refer to Subsection 5.2.5
6) When b8 is set to ON, all error flags are reset.
7) When b9 is set to ON, YH output is reset.
8) When b10 is set to ON, YS output is reset.
9) When b11 is set to ON, YH output is set ON.
10)When b12 is set to ON, YS output is set ON.
Count Direction Setting Value
Up count K0
Down count K1
Bit No.
Setting Value
OFF (0) ON (1)
b0 Count prohibit Count permit
b1 YH output prohibit YH output permit
b2 YS output prohibit YS output permit
b3 YH/YS independent action Mutual reset action
b4 Preset prohibit Preset permit
b5 ~ b7 Not available
b8 No action Error flag reset
b9 No action YH output reset
b10 No action YS output reset
b11 No action YH output set
b12 No action YH output set
b13 ~ b15 Not available
UP/DOWN is
determined by the
contents of BFM #1,
(K0/K1).
BFM #1
Phase B
Current
value
UP DOWN
K1K0
ON
OFF
FNC 79
DTO K100K2 K2 K1
X002
UP
DOWN
10 9899
9998 0 1
Example program
The ON/OFF status of M25 to M10 is written in BFM #4 of special function block
No.2 by the following program, and b15 to b0 action. Among these, b4 to b0 are
always ON as controlled by M10-M14.
Furthermore, b8 (M18), b9 (M19), and b10 (M20) are controlled by the input X004
of the PLC, and X005 by ON/OFF.
5.2.5 Preset data [BFM #11, #10]
When BFM #4 b4 is ON and the PRESET input is switched from OFF to ON,
preset data is stored into BFM #21, #20 (counter current value).
→ For command details, refer to Subsection 5.2.4
5.2.6 YH compare value [BFM #13,#12],
YH compare value [BFM #15,#14]
•After comparing the current value of the
counter with the value written in BFM #13
and #12, BFM #15 and #14, the hardware
and software comparator in the FX2NC-
1HC outputs the comparison result.
•YH, YS output will not turn ON if using
PRESET or the TO instruction to set the
counter value equal to the comparison
value. It will turn ON only when a match
occurs by the counting of input pulses.
However, when BFM #4 b1, b2 are OFF,
it does not set.
•Output occurs when the current value
becomes equal to the compare value but
only if b1 and b2 of BFM #4 are ON.
Once an output is set, it remains ON until
it is reset by b9 or b10 of BFM #4. If b3 of
BFM #4 is ON, however, one of the
outputs is reset when the other is set.
•The YS comparison operation takes
about 300µs, and if a match occurs, the
output goes ON.
5.2.7 Counter current value [BFM #21, #20]
The current value of the counter can be read by the PLC. It will not be the correct
value during high-speed operations because of the communication delay. The
current value of the counter can be forcibly changed by writing a 32-bit value into
the appropriate BFMs from the PLC.
5.2.8 Maximum count value [BFM #23, #22],
Minimum count value [BFM #25, # 24]
These store the maximum and minimum value reached by the counter. If the
power is turned off, the stored data is cleared.
5.2.9 Compare results [BFM #26]
Bit No. Targe t
output OFF (0) ON (1)
b0
YH
Set value ≤current value Set value >current value
b1 Set value ≠current value Set value =current value
b2 Set value ≥current value Set value <current value
b3
YS
Set value ≤current value Set value >current value
b4 Set value ≠current value Set value =current value
b5 Set value ≥current value Set value <current value
b6 ~ b15 Not available
~
FNC 79
DTO K4M10K2 K4 K1
M8000
X004
X005
M8000
M10 M14
Count allowed, YH/YS Output
allowed, Mutual reset,
Preset allowed
RUN
monitor
M18 Error flag reset
M19 M20 YH YS output reset
BFM #4
b9,b10
Setting value
Current value
Coincidence output
Setting value
Current value
BFM #4
b9,b10
Coincidence output
5.2.10 Terminal status [BFM #27]
5.2.11 Error status [BFM #29]
Error status in the FX2NC-1HC can be checked by reading the contents of b0 to b9
of BFM #29 to auxiliary relays of the PLC.
There error flags can be reset by b8 of BFM #4.
5.2.12 Model identification code [BFM #30]
This BFM stores the identification number for FX2NC-1HC.
The identification number for the FX2N-1HC unit is K4010.
By reading this identification number, the user may create built-in checking
routines to check whether the physical position of the FX2NC-1HC matches to that
of the software.
6. Example Program
Please use the following program as a guide whenever you use the FX2NC-1HC
unit. Other instructions to read the current value of the counter, status etc. can be
added as required.
Bit N0. Signal Name OFF (0) ON (1)
b0 PRESET input OFF ON
b1 DISABLE input OFF ON
b2 YH output OFF ON
b 3 YS output OFF ON
b 4 ~ b15 Not available
Bit N0. Error Status
b0 Set when any of b1 to b7 is ON.
b1 Set when the value of the ring length is written incorrectly.
(Except K2 to K65,536)
b2 Set when the preset value is written
incorrectly.
When value ≥ring length in
16-bit counter mode.
b3 Set when the compare value is
written incorrectly.
b4 Set when the current value is
written in correctly.
b5 Set when the counter overflows the
upper limit. When the upper or lower limit
is exceeded on a 32-bit
counter.
b6 Set when the counter overflows the
lower limit.
b7 Set when the FROM/TO command is used incorrectly.
b8 Set when the counter mode
(BFM#0) is written incorrectly. Except K0 to K11
b9 Set when the BFM number is
written incorrectly. Except K0 to K31
b10 ~ b15 Not available
FNC 78
FROM K3M100K2 K29 K1
M8000
M8002
Initial
pulse
FNC 79
TO K11K2 K0 K1
K11 is written into BFM #0 of special function block No.2. The
counter input is 16-bit 1-phase. Please use a pulse command for
this initialization.
FNC 79
DTO K1234K2 K2 K1
K1234 → BFM #3, #2 (special function block No.2)
The ring length can be specified when a 16-bit counter is specified.
FNC 79
TO K1K2 K1 K1
UP/DOWN direction should be specified for 1-phase 1-input
software determined UP/DOWN counter.
FNC 79
DTO K1000K2 K12 K1
K1000 → BFM #13, #12
Set the compare value for YH output.
7. Preliminary checks
1) Check that the I/O wiring and extension cable of the FX2NC-1HC are properly
connected.
2) The FX2NC-1HC occupies 8 points of I/O on the FX2NC, FX3UC expansion bus.
The 8 points can be allocated from either inputs or outputs.
5V DC 90mA power is supplied from the main or extension power supply units
(FX3UC only) for the FX2NC-1HC. Check that there is no power overload from this
and other extension blocks.
3) The following derating curve shows the simultaneous ON ratio of available power
for products connected to the FX2NC-1HC with respect to the ambient
temperature.
Use the adjoined following product within the simultaneous input ON ratio range
shown in the figure.
Target input extension block:FX2NC-16EX, FX2NC-16EX-DS,
FX2NC-32EX, FX2NC-32EX-DS
4) The counter works correctly only when data such as the counter mode (set with a
pulse command), the TO command, the compare value, etc. are appropriately
specified. Remember to initialize the count (BFM #4 b0), preset (BFM #4 b4), and
output (BFM #4 b2, b1) prohibits. Reset the YH/YS outputs before you start.
Note
Note that inputting the pulse higher than the maximum frequency may cause mis-
counting to FX2NC-1HC or a FROM/TO error to the PLC main unit.
~
M8000
M8000
M11 M13
FNC 79
DTO K900K2 K14 K1
K900 → BFM #15, #14
Set the compare value for YS output (not necessary if only YH output is
used).
Count allowed
Output allowed,
Mutual reset
Preset allowed
Error flag reset
YH output reset
YS output reset
Note that counting only occurs if count prohibit is OFF. Also, outputs will not be set from
the counting process at all if the relevant output prohibit are set in the command register.
Please reset the error flags and YH/YS output before you start. The mutual reset and
preset initialization commands can be used as required.
X010
M10
X011
M14
X012
PLS M18
X013
PLS M19
PLS M20
RUN
monitor
FNC 79
TO K4M10K2 K4 K1
FNC 78
DFROM D2K2 K20 K1
(M25 to M10) → BFM #4 (b15 to b0) command
BFM (#21, #20)
→ Reads the current value to the data registers D3 and D2.
Derating curve: FX 2NC -16EX(-DS), FX 2NC -32EX(-DS)
Simultaneous ON ratio
100%
45°C
60%
55°C Ambient temperature
Supply voltage:24V DC
8. Diagnostics
1) The following LEDs on the main panel of the FX2NC-1HC may help you to
troubleshoot the unit.
a) φA, φB:
Goes on/off as φA, φB input turn ON/OFF. It can be checked by rotating the
encoder slowly.
b) UP, DN:
Lights up to indicate whether the counter is going up (UP) or down (DN).
c) PR, DS:
The appropriate LED lights up when the PRESET (PR) terminal or the
DISABLE (DS) terminal is ON.
d) YH, YS:
The appropriate LED lights up when YH/YS output is turned on.
2) You can check the error status by reading the content of BFM #29 to the PLC.
→ For error contents, refer to the Subsection 5.2.11
STARTUP AND MAINTE-
NANCE PRECAUTIONS
•Do not disassemble or modify the PLC.
Doing so may cause fire, equipment failures, or malfunctions.
* For repair, contact your local Mitsubishi Electric distributor.
•Do not drop the product or exert strong impact to it.
Doing so may cause damage.
DISPOSAL
PRECAUTIONS
•Please contact a certified electronic waste disposal company for the
environmentally safe recycling and disposal of your device.
TRANSPORT AND STOR-
AGE PRECAUTIONS
•The product is a precision instrument. During transportation, avoid any impacts.
Failure to do so may cause failures in the product.
After transportation, verify the operations of the product.
9. System Block Diagram
BFM #4 b1
T0 16-bit counter
1-phase
1-input
counter
ØB
ØA
DISABLE
PRESET
Preset data
BFM#11, #10
Model code
BFM #30
Maximum value
BFM #23, #22
Minimum value
BFM #25, #24
Error status
BFM #29
Comparisor data
BFM #13, #12
Comparision data
BFM #15, #14
Compare results
BFM #26
Terminal status
BFM #27
S
R
S
R
YH
YS
ØZ
Direct initialization
Count start
BFM#4 b4
DOWN/UP
Counter
16/32-bit
1-phase/2-phase
Current value
register
BFM #21, #20
Reset
BFM #4 b8
for YH output
Matched
for YS output
Sampling cycle
300
µ s
Comparison is made at the next
sampling point after an input
count.
*1
*1
Matched
BFM #4 b11
BFM #4 b9
BFM #4 b2 BFM #4 b12
BFM #4 b10
Count pulse
T0
T0
BFM #4 b0
T0
T0
BFM #4 b3
Counter mode
BFM #0
Ring upper limit value
BFM #3, #2
DOWN/UP command
BFM #1
Initiali-
zation