Mitsubishi Electric MELSEC-F FX2N-1HC User manual

FX2N-1HC SPECIAL FUNCTION BLOCK
USER’S GUIDE
JY992D65401C
This manual contains text, diagrams and explanations which will guide the reader in the correct installation
and operation of the FX2N-1HC special function block and should be read and understood before attempting
to install or use the unit.
Further information can be found in the FX PROGRAMMING MANUAL and FX2N SERIES HARDWARE
MANUAL.
1. INTRODUCTION
• The hardware high-speed counter block is a 2-phase 50 kHz high-speed counter. It is a special function
block for the FX2N, FX2NC series PLC. The FX2N-1HC counts at a higher speed than the built-in high-
speed counter of the PLC (2-phase 30 kHz, 1-phase 60 kHz) and performs comparisons and outputs
directly.
• 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 FX2N-1HC unit to run only after setting these mode parameters.
• 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 (DIS-
ABLE) are also available.
• The FX2N-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.
• Data transfer between the FX2N-1HC and the FX2N PLC is by buffer memory exchange. There are 32
buffer memories (each of 16 bits) in the FX2N-1HC.
• The FX2N-1HC occupies 8 points of I/O on the FX2N, FX2NC expansion bus. The 8 points can be allo-
cated from either inputs or outputs.
1.1 External dimensions
<Using the solderless termination>
POWER
YH
YS
UP
DOWN
DIS
PRE
FX2N-1HC
55(2.17)
4(0.16)
90(3.54)
80(3.15)
YS+
YS-
YH+XP5
YH-
COMP
XP24
XD24
5+
24+
A5+
A12+ A - 12+ - XD5 COMD
A24+
4
(0.16)
87(3.43)
øA
ø
1
17
16
2
55(2.17)
3
4
5
6
7
8
9
10
11
12
13
14
15
11
24+
A5+
A12+ A - 12+
A24+
1Mounting hole 2-φ4.5 (0.18)
2Extension cable and connector
3UP LED
4DN (Down) LED
5φA LED
6φB LED
7POWER LED
8 φA, φB terminal (M3 (0.12) screws)
9 PRESET terminal (M3 (0.12) screws)
10 YHxYS terminal (M3 (0.12) screws)
11 DISABLE terminal (M3 (0.12) screws)
12 DIS (DISABLE) LED
13 PRESET LED
14 YH LED
15 YS LED
16 DIN rail clip
17 Attachment groove for 35 (1.38) wide DIN rail
Mass (weight): Approx. 0.3 kg (0.66 lbs) Dimensions: mm (inches)
Accessories: Self-adhesive labels special block number identification.
6.2mm
(0.24 inches)
or less
FOR M3
(0.12 inches)
6.2mm
(0.24 inches)
or less
• Use crimp terminals of the dimensions specified in the left figure.
• Secure the terminals using a tightening torque of 0.5 to 0.8 Nxm
(5 to 8 kgxcm).
• Wire only to the module terminals discussed in this manual.
Leave all others vacant.

2. WIRING
PNP output encoders
If using on NPN output encoder please take care to match the polarity of the terminals of the
encoder to those of the FX2N-1HC.
Line driver output encoders
3. SPECIFICATIONS
3.1 Environmental specifications
3.2 Performance specifications
Item Specification
Environmental specifications (excluding following) Same as those for the FX2N main unit
Dielectric withstand voltage 500V AC, 1min (between all terminals and ground)
Item 1-phase input 2-phase input
1 input 2 inputs 1 edge count 2 edge count 4 edge count
Input signal
Signal level
Phase A, Phase B [A24+],[B24+] :24V DC±10% 7mA or less
[A12+],[B12+] :12V DC±10% 7mA or less
[A5+],[B5+] :3.5V to 5.5V DC 10.5mA or less
PRESET,DISABLE [XP24],[XD24] :10.8V to 26.4V DC 15mA or less
[XP5],[XD5] :5V DC±10% 8mA or less
(Selected by terminal connection)
MAX. frequency 50 kHz 25 kHz 12.5kHz
Pulse shape
t1 :Rise/fall time is 3ms or less
t2 :ON/OFF pulse duration 10µs or more
t3 :Phase difference between phase A and
phase B is 3.5ms or more
PRESET(Z phase) input 100µs or more
DISABLE (count prohibit) input 100ms or more
Counting
specification
Format Automatic UP/DOWN (however, when on 1-phase 1-input mode, UP/DOWN is
determined by a PLC command or an input terminal.)
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 can be user specified)
Comparison
Ty p e
Each output is set when the present value of the counter matches with the
compare value (which is transferred from the PLC), and is switched OFF by a
reset command from the PLC.
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 to 24V DC 0.5A
I/O occupation 8 points taken from the FX2N expansion bus (can be either inputs or outputs)
Power from base 5V DC 90mA(Internal power supply from main unit or powered extension unit)
COM+24V
OUT
OUT
OUT
0 V
+24V
A24+
A12+
A5 +
A -
B24+
B12+
B5 +
B -
XP24
XP 5
XD24
XD 5
PLC
3.3k
1.5k
0.27k
0.1k
1.5k
0.5k
0.2k
12 to 24V inputtable
+24V
*1
2.2kW YH-
YH+
YS-
0 V
External power source
DC5V,12V,24V
Class 3
grounding
(<100 )
Extension
cable
START
YS+
*1. " " is an external load
connected with the out put.
*2. Connect the grounded terminal
at the PLC side as required.
Power supply for out put
load drive DC5 to 24V
FX2N-1HC
PNP output encoders
Shielding Wire
PRESET
DISABLE
COMD
Shielding Wire
Shielding Wire
Shielding Wire
Phase A
Phase B
Phase Z
*2
12 to 24V
inputtaable
2.2kW
*1
*1
*1
:source
:sink
:
ØA
COMP
ØB
LB
LBR
B5+
B -
A5+
A -
LA
LAR
Line driver output encoders FX
2N
-1HC
Shielding Wire
t1 t1
t2 t2
t3
t3
YH+
YS+
YH-
YS-
NPN

3.3 Buffer memories (BFM)
#5-#9, #16-#19, #28, #31 are reserved.
1) BFM #0 Counter mode (K0 to K11), BFM #1 DOWN/UP command
a) 32-bit counter modes
A 32-bit binary counter which executes UP/DOWN counting will change
from the lower limit to the upper limit or the upper limit to the lower limit
when overflow occurs. Both the upper and lower limits are fixed values: the
upper limit is +2,147,483,647, and the lower limit is -2,147,483,648.
b) 16-bit counter modes
A 16-bit binary counter handles only positive values from 0 to 65,535.
Changes to zero from the upper limit or to the upper limit from zero when
overflow occurs; the upper limit is determined by BFMs #3 and #2.
c) 1-phase 1-input counter (K8 to K11)
d) 1-phase 2-input counter (K6, K7)
e) 2-phase counter (K0 to K5)
BFM number Contents
Write
#0 Counter mode K0 to K11 Default: K0
#1 DOWN/UP command (1-phase 1-input mode) Default: K0
#3,#2 Ring length Upper/Lower Default: K65,536
#4 Command Default: K0
#11,#10 Preset data Upper/Lower Default: K0
#13,#12 YH compare value Upper/Lower Default: K32,767
#15,#14 YS compare value Upper/Lower Default: K32,767
Write / Read
#21,#20 Counter current value Upper/Lower Default: K0
#23,#22 Maximum count value Upper/Lower Default: K0
#25,#24 Minimum count value Upper/Lower Default: K0
Read
#26 Compare results
#27 Terminal status
#29 Error status
#30 Model identification code K4010
Count modes 32 bits 16 bits
2-phase input
(phase difference pulse)
1 edge count K0 K1
2 edge count K2 K3
4 edge count K4 K5
1-phase 2-input (add/subtract pulse) K6 K7
1-phase 1-input
Hardware
UP/DOWN K8 K9
Software
UP/DOWN K10 K11
The counter mode is selected form the
PLC. As shown below, values between K0
and K11 are written to buffer memory BFM
#0 form the PLC. When a value is written to
BFM #0 the contents of BFM #1 to BFM #31
are reset to default values. When setting
this value use a TOP (pulsed) instruction
use M8002 (initial pulse) to drive the TO
instruction.
A continuous command is not allowed.
+2,147,483,647
Upper limit
Lower limit
-2,147,483,648
Ring length
(BFM#3,#2)
0
0
Phase A
Current
value
UP DOWN
ON
OFF
ON
OFF
UP/DOWN is
determined by
input phase A
(ON/OFF).
Phase B
BFM#1 K1K0
ON
OFF
Current
value
UP DOWN
UP/DOWN is
determined by
the contents of
BFM #1, (K0/K1).
Phase B
• Hardware UP/DOWN (K8, K9) •Software UP/DOWN (K10, K11)
ON
OFF
Phase
A input
ON
OFF
Phase A input-1
at OFFoON
10323321
Phase
B input
Phase B input+1
at OFFoON
If both phase A and phase B inputs are received
simultaneously, the counter value does not change.
+1+1 -1-1
Phase B
Phase B input OFF
oON while phase
A input ON Count
up by 1.
Phase B input ON
oOFF while phase
A input ON Count
down by 1.
Phase A
+1+1 -1
-1
Phase B input OFF
oON while phase
A input ON Count
up by 1.
Phase B input ON
oOFF while phase
A input ON Count
down by 1.
Phase B
Phase A
+1
UP COUNT
+1 +1
+1
Phase A input
Phase B input
-1
DOWN COUNT
-1 -1-1
Phase A input
Phase B input
•1 edge-count-counter (K0, K1) •2 edge-count counter (K2, K3)
•4 edge-count counter (K4, K5)

2) BFM #3, #2 Ring length
Note: Write counter data with (D) TO
• Count data is always handled as a pair from two 16-bit values in this special function block. 16-bit 2’s
complement value stored in the registers of the PLC cannot be used.
• When you are writing a positive value between K32,768 and K65,535, the data should be treated as a
32-bit value even when a 16-bit ring counter is used.
• When transferring counter data to/from this special function block, always use the 32-bit forms of the
FROM/TO instructions ((D) FROM, (D) TO).
3) BFM #4 Command
4) BFM #11, #10 Preset data
• Data to used as the initial value when the counter starts to count.
• Data becomes valid when b4 of BFM #4 is set to ON, and PRESET input terminal changes from OFF
to ON. The default value of the counter is zero. You can change it by writing a value into BFM #11 and
#10 or by using the command below.
• The initial counter value can also be set by writing the data directly into BFM #21 and #20 (current
value of the counter).
5) BFM #13, #12 Comparison value for YH output, BFM #15, #14 Comparison value for YS output
• 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 FX2N-1HC outputs the comparison
result.
• YH, YS output will not turn ON if you use 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.
• The YS comparison operation takes about 300µs, and if a match
occurs, the output goes ON.
• 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.
6) 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.
7) Maximum count value (BFM #23, 22)
These store the maximum and minimum value reached by the counter. If the power is turned off, the
stored data is cleared.
8) Comparison status (BFM #26)
BFM #26 is for reading only. Write commands from the programmable controller are ignored.
9) Terminal status (BFM #27)
BFM#4 When ’0’(OFF) When ’1’(ON)
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 to b7 Undefined
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 YS output set
BFM#26 When ’0’ (OFF) When ’1’ (ON) BFM#26 When ’0’ (OFF) When ’1’ (ON)
YH
b0 Set value ≤current
value
Set value > current
value
YS
b3 Set value ≤current
value
Set value > current
value
b1 Set value ≠current
value
Set value = current
value b4 Set value ≠current value
Set value = current
value
b2 Set value ≥current
value
Set value < current
value b5 Set value ≥current value
Set value < current
value
BFM#26 When ’0’ (OFF) When ’1’ (ON) BFM#26 When ’0’ (OFF) When ’1’ (ON)
b0 PRESET input is OFF. PRESET input is ON. b2 YH output is OFF. YH output is ON.
b1 DISABLE input is OFF. DISABLE input is ON. b3 YS output is OFF. YS output is ON.
b4-b15 Undefined
X 002
T0 K2 K2 K100 K1
D
UP
DOWN
98 99 0 1
1 0 99 98
In the above example, K100 is written into BFMs #3 and
#2 of special block No.2 as a 32-bit binary value (BFM
#3 = 0, BFM #2 = 100). Permitted values: K2 to K65,536.
When ring length K100 is specified, the
value of the counter changes as shown
above.
Stores the data that specifies the length of the
16-bit counter (default: K65,536).
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.
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.
Current value
Current value
BFM #4
b9,b10
Coincidence output
Current value
Current value
BFM #4
b9,b10
Coincidence output

10) BFM #29 Error status
Error status in the FX2N-1HC can be checked by reading the contents of b0 to b7 of BFM #29 to
auxiliary relays of the PLC.
There error flags can be reset by b8 of BFM #4.
11) Model identification code number BFM #30
The identification number for a Special Function Block is read by using the FROM command.
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 FX2N-1HC matches to that of the software.
4. EXAMPLE PROGRAM
Please use the following program as a guide whenever you use the FX2N-1HC unit. Other instructions to
read the current value of the counter, status etc. can be added as required.
5. DIAGNOSTICS
5.1 Preliminary checks
1) Check that the I/O wiring and extension cable of the FX2N-1HC are properly connected.
2) 5V 90mA power is supplied from the main or extension units for the FX2N-1HC. Check that there is no
power overload from this and other extension blocks.
3) 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.
5.2 Error checking
The following LEDs on the main panel of the FX2N-1HC may help you to troubleshoot the unit.
• φA, φB :Goes on/off as φA, φB input turn ON/OFF. It can be checked by rotating the encoder
slowly.
• UP, DN :Lights up to indicate whether the counter is going up (UP) or down (DN).
• PRESET and DIS:The appropriate LED lights up when the PRESET terminal or the DISABLE terminal
is ON.
• YH, YS :The appropriate LED lights up when YH/YS output is turned on.
You can check the error status by reading the content of BFM #29 to the PLC.
Error contents are shown in section 3.3 (10).
BFM#29 Error status
b0 Set when any of b1 to b7 is ON.
b1 Set when the value of the ring length is written incorrectly (other than 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. When outside of K0 to K11
b9 Set when the BFM number is written incorrectly. When outside of K0 to K31
b10-b15 Undefined
M8002
Initial
pulse
T0 K2 K0 K11 K1
T0 K2 K2 K1234 K1
D
T0 K2 K1 K1 K1
T0 K2 K12 K1000 K1
D
T0 K2 K14 K900 K1
D
M8000
X 011
X 012
X 013
PLS M19 and M20
M11 M13
M14
X 010
M10 Count allowed
Output allowed
Mutual reset
Preset allowed
Error flag reset
PLS M18
YH YS output reset
M8000
RUN
monitor
T0 K2 K4 K4M10 K1
FROM K2 K20 D 2 K1
M8002
X 014
to
D
1. 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.
2. K1234→BFM #3, #2 (special function block No.2)
The ring length can be specified when a 16-bit
counter is specified.
3. UP/DOWN direction should be specified for 1-phase
1-input software determined UP/DOWN counter.
4. K1000→BFM #13, #12
Set the compare value for YH output.
5. K900→BFM #15, #14
Set the compare value for YS output (not necessary if
only YH output is used).
6. 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.
7. (M25 to M10) →BFM #4 (b15 to b0) command
8. BFM (#21, #20)→Reads the current value to the data
registers D3 and D2.

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6. 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
300ms
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
Guidelines for the safety of the user and protection of the FX2N-1HC special
function block
• This manual has been written to be used by trained and competent personnel. This is defined
by the European directives for machinery, low voltage and EMC.
• If in doubt at any stage during the installation of the FX2N-1HC always consult a professional
electrical engineer who is qualified and trained to the local and national standards. If in doubt
about the operation or use of the FX2N-1HC please consult the nearest Mitsubishi Electric
distributor.
• Under no circumstances will Mitsubishi Electric be liable or responsible for any consequential
damage that may arise as a result of the installation or use of this equipment.
• All examples and diagrams shown in this manual are intended only as an aid to understanding
the text, not to guarantee operation. Mitsubishi Electric will accept no responsibility for actual
use of the product based on these illustrative examples.
• Owing to the very great variety in possible application of this equipment, you must satisfy
yourself as to its suitability for your specific application.
Manual number : JY992D65401
Manual revision : C
Date : JULY 2000
JY992D65401C
Effective JUL. 2000
Specifications are subject to
change without notice