Mitsubishi Electric MELSEC FX2N-4da User manual

This manual contains text, diagrams and explanations which will guide the reader in the correct installation and
operation of the FX2N-4DA 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, FX2N SERIES HARDWARE MANUAL .
•The FX2N-4DA analog special function block has four output channels. The output channels take a digital value and
output an equivalent analog signal. This is called a D/A conversion. The FX2N-4DA has maximum resolution of 12
bits.
•The selection of voltage or current based input/output is by user wiring. Analog ranges of -10 to 10V DC (resolution:
5mV), and/or 0 to 20mA (resolution: 20µA) maybe selected independently for each channel.
•Data transfer between the FX2N-4DA and the FX2N main unit is by buffer memory exchange. There are 32 buffer
memories (each of 16 bits) in the FX2N-4DA.
•The FX2N-4DA occupies 8 points of I/O on the FX2N expansion bus. The 8 points can be allocated from either inputs
or outputs. The FX2N-4DA draws 30mA from the 5V rail of the FX2N main unit or powered extension unit.
●Weight : Approx. 0.3 kg (0.66 lbs) ●Accessory: Special block number label
Handling of crimp-style terminal
•Be sure to use the crimp-style terminals that satisfy the dimen-
sional requirements shown in the left figure.
•Apply 0.5 to 0.8 N⋅m (5 to 8 kgf⋅cm) torque to tighten the termi-
nals. Firmly tighten the terminals to prevent abnormal operation.
P OW E R
D/A
24V
F X2 N-4 DA
I+
V+
I+
VI-
C H4
C H3
C H2
C H1
V+
I+V+
I+
V+
24+
24-
VI- V I- VI -
8
9
1
4(0.16) 2
55(2.17)
90(3.54)
87(3.43) 55(2.17)
80(3.15)
9(0.35)
7
654
3
4(0.16)
C H1
V+
24+
24-
VI-
CONNECTION TO PROGRAMMABLE CONTROLLER
Various special blocks controlled by the FROM/TO commands, such as the analog input blocks high-speed counter
blocks, etc. can be connected to the FX2N programmable controller (MPU), or connected to the right side of the other
extension blocks or units. Up to eight special blocks can be connected to a single MPU in the numeric order of No. 0 to
No. 7.
WIRING: The terminal layout shown below may differ from the actual layout. For the correct terminal layout, refer to
section 2 External Dimensions and Parts.
ENVIRONMENTAL 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)
PERFORMANCE SPECIFICATIONS
Item Voltage output Current output
Analog output range -10V DC to +10V DC (External load
resistance: 2kΩto 1MΩ).
DC 0mA to +20mA (External load resistance:
500Ω).
Digital input 16 bits, binary, with sign (Effective bits for numeric value: 11 bits and sign bit (1 bit))
Resolution 5mV (10V ×1/2000) 20µA (20mA ×1/1000)
Total accuracy ±1% (at full scale of +10V) ±1% (at full scale of +20mA)
Conversion speed 2.1ms for 4 channels (Change in the number of channels used will not change the conversion
speed.)
Isolation
Photo-coupler isolation between analog and digital circuits.
DC/DC converter isolation of power from FX2N main unit.
No isolation between analog channels.
External power
supply 24V DC ±10% 200mA
Number of occupied
I/O points 8 points taken from the FX2N expansion bus (can be either inputs or outputs)
Power consumption 5V, 30mA (Internal power supply from MPU or powered extension unit)
I/O characteristics
(Default: mode 0)
Follow the procedure
described in section 8
to change
At load resistance of 10kΩAt load resistance of 250Ω
At load resistance of 250Ω
Command sent from the programmable controller can
change the mode. The voltage/current output mode
selected will determine the output terminals used.
Data is transmitted between the FX2N-4DA and the MPU via buffer memories (16-bit 32-point RAM).
Buffer memories marked “W” can be written to
using the T0 instruction in the MPU.
The status of BFM #0, #5, and #21, (marked E)
will be written to EEPROM, therefore the set
values will be retained even after turning off the
power.
➀[BFM #0] Output mode select: The value of BFM #0 switches the analog output between voltage and current on
each channel. It takes the form of a 4 digit hexadecimal number. The first digit will be the command for channel
1 (CH1), and the second digit for channel 2 (CH2) etc. The numeric values of these four digits respectively
represent the following items:
O = 0:Sets the voltage output mode (-10 V to +10 V).
O = 1:Sets the current output mode (+4 mA to 20 mA).
O = 2:Sets the current output mode (0 mA to +20 mA).
Switching the output mode resets the I/O characteristics to the factory-set characteristics. Refer to the performance
specifications described in section 4.
Example: H2110 CH1 : Voltage output (-10 V to +10 V)
CH2 and CH3 : Current output (+4 mA to +20 mA)
CH4 : Current output (0 mA to +20 mA)
➁[BFM #1, #2, #3 and #4]: Output data channels CH1, CH2, CH3, and CH4
BFM #1: Output data of CH1 (Initial value: 0) BFM #2: Output data of CH2 (Initial value: 0)
BFM #3: Output data of CH3 (Initial value: 0) BFM #4: Output data of CH4 (Initial value: 0)
➂[BFM #5]: Data holding mode: While the programmable controller is in the STOP mode, the last output value in the
RUN mode will be held. To reset the value to the offset value, write the hexadecimal value in BFM #5 as follows:
O = 0: Holds the output.
O = 1: Resets to the offset value.
Example: H0011 ⋅⋅⋅⋅⋅⋅ CH1 and CH2 = Offset value CH3 and CH4 = Output holding
In addition to the above functions, the buffer memories can adjust the I/O characteristics of the FX2N-4DA, and report
the status of the FX2N-4DA to the programmable controller.
Buffer memories marked “W” can be written
to using the TO instruction in the MPU.
The status of BFM #0, #5, and #21, (marked
E) will be written to EEPROM, therefore the
set values will be retained even after turning
off the power.
*1:Offset data: Actual analog output value
when corresponding output
data (BFM #1 through #4) is 0
*2:Gain data: Actual analog output value
when corresponding output
data (BFM #1 through #4) is
+1,000
*3: When current output mode 1 (+4 mA to
+20 mA) is set, the offset data will be
automatically set to +4,000 and the gain
data to +20,000. When the current
output mode 2 (0 mA to +20 mA) is set,
the offset data will be automatically set
to 0 and the gain data to +20,000.
➃[BFM #8 and #9] Offset/gain setting command: Changes offset and gain values of channels CH1 through CH4 by
writing 1 to the corresponding Hex digits of BFM #8 or #9. The current values will be valid until this command is
output.
BFM #8 BFM #9
O = 0: No changes done.
O = 1: Change data value.
(Program example : see section 8.)
➄[BFM #10 through #17] Offset/gain data: The offset and gain values are changed by writing new data to BFM #10
through #17. The units of the data to be written is mV or µA. The data should be written and then BFM #8 and #9
set. Note that the data value will be rounded down to the nearest 5mV or 20µA.
➅[BFM #20] Initialize: When K1 is written in BFM #20, all values will be initialized to the factory-settings.
(Note that the BFM #20 data will override the BFM #21 data.) This initialize function is convenient if you have an
error in adjustment.
➆[BFM #21] I/O characteristics adjustment inhibit: Setting BFM #21 to 2 inhibits the user from inadvertent adjustment
of I/O characteristics. The adjustment inhibit function, once set, will be valid until the Permit command (BFM
#21=1) is set. The initial value is 1 (Permit). The set value will be retained even after power-off.
FX2N-4DA
JY992D65901A
2
➀Extension cable
➁Power indicator lamp (LED)
5 V power is supplied from the programmable
controller to light this indicator lamp.
➂Power supply terminals
(Screw terminal: M3 (0.12))
➃Analog output terminals
(Screw terminals : M3 (0.12))
➄24 V power indicator lamp (LED)
24 VDC power is supplied to the terminals of the
FX2N-4DA to light this indicator lamp.
➅D/A conversion indicator lamp (LED)
Flashes at a high speed if D/A conversion is
performing without a problem.
➆Hook for DIN rail
➇Groove for DIN rail mounting
(Width of DIN rail : 35 mm 1.38")
➈Hole for direct mounting (2-φ4.5) (0.18)
*1: Use a twisted pair shielded cable for the analog
output. This cable should be wired away from power
lines or any other lines which could induce noise.
*2: Apply 1-point grounding at the load side of the output
cable (class 3 grounding: 100Ωor less).
*3: If electrical noise or a voltage ripple exists at the
output, connect a smoothing capacitor of 0.1 to
0.47µF, 25V.
*4: Connect the terminal on the FX2N-4DA with the
terminal on the MPU of the programmable
controller.
*5: Shorting the voltage output terminal or connecting the
current output load to the voltage output terminal
may damage the FX2N-4DA.
*6: The 24V DC service power of the programmable
controller can also be used.
*7: Do not connect any unit to the unused terminal
BFM Description
W
#0 E Output mode select. Factory setting H0000
#1
Output data (Signed 16 bits binary: actual
value 11 bits + sign)
#1: CH1, #2: CH2, #3: CH3, #4: CH4
#2
#3
#4
#5 E Data holding mode. Factory setting H0000
#6, #7 Reserved
BFM Description
W
#8(E) Offset/gain setting command CH1, CH2 Initial value H0000
#9(E) Offset/gain setting command CH3, CH4 Initial value H0000
#10 Offset data CH1 *1
Unit: mV or µA
Initial offset value: 0
Initial gain value: +5,000
#11 Gain data CH1 *2
#12 Offset data CH2 *1
#13 Gain data CH2 *2
#14 Offset data CH3 *1
#15 Gain data CH3 *2
#16 Offset data CH4 *1
#17 Gain data CH4 *2
#18, #19 Reserved
W#20(E) Initialize. initial value = 0
#21 E I/O characteristics adjustment inhibit (Initial value 1)
#22-#28 Reserved
#29 Error status
#30 K3020 identification code
#31 Reserved
1
3
4
5
Mode 1 (Current
output: +4mA to +20mA)
Mode 2 (Current
output: 0mA to +20mA)
6.2mm (0.24inches) or les s
F O R M3 (0. 12 )
F X -16E X
X000-X 027
Y 00 0-Y 0 27
X030
-X 047
2N
F X -48M R -E S /UL
2N
F X -4AD
2N
No .2
2N
F X -4AD -P T
X050-X 067
Y 03 0-Y 0 47
2N
F X -32 E R
2N
F X -4DA
FX -48M R -E S/UL
2N
POW E R
A/D
24V
FX -4AD
2N
PO WE R
D/A
24V
FX -4DA
2N
No .1
No .0
PO WE R
24V
A/D
S pecial block S pecial block S pecial block
X0
X5
72 456130
1611 1514 1710 12 13
14 171510 12 13
72 456130
1611
OUT
IN
LX11 X13 X1 5 X17
X6 X 10 X12 X14 X16
24+
N
COM X4
X7
COM4
COM2
Y4
Y5
Y6
Y7 COM3
Y10
Y11
Y12
Y13
COM1
Y0
Y1
Y2
Y3
Y14
Y15
Y16
Y17
X3
X2
X1
POW E R
762720 2 2 23 24 25 2621
16 17
14 171510 12 13
724561302 720 22 23 24 25 2 621
1611
IN
LX5X7
X13 X15 X 17 X21 X23 X 25
X4 X 6 X10 X14 X 16 X20 X22 X2 4
24+N
COM X0
X1
X2
COM4
Y24
Y25
COM5
Y27COM2
Y4
Y5
Y6
Y7 COM3
Y10
Y13COM1
Y0 Y 2
Y3
Y14
Y15
Y20
Y21
Y22
Y23
Y26
POW E R
T.V
CPU .E
PR OG . E
*6
DC 2 4V ±10 %2 00 mA
*4
C las s 3
G rounding
(100
Ω
or les s )
P C
E xtens ion ca ble
24+
24-
F X -4DA
2N
DC /DC
conve rter
AG
+15V
+15V
C H1
C H2
V+
I +
VI -
V+
I +
VI -
*2
*5
*2
Mixed output from the sa me channel is not pos s ible.
*1
*7
*3 Inverter,etc.
R ec order,e tc.
*1
Ana log output
Digital input
+10V
+10. 235V
-2, 00 0
+2,000
-10 V
-10 .2 4V
-2, 04 8
+2,047
Mode 0 (Voltage
output: -10V to +10V)
Ana log
output
+4mA
Digital input
+20mA
0+1,000
Ana log
output
Digital input
+20mA
0+1,000
C H4 C H3 C H 2 C H1
H
G 2
H
O 2 G 1 O1
C H4 C H3 C H 2 C H1
H
G 4
H
O 4 G 3 O 3
*3
Output

mode 0
资料提供 思南工控 http://GKong.com
特殊功能模块
使用指南
引言
外部端子和部件 说明
安装与接线 缓存（ＢＦＭ）的分配

➇[BFM #29] Error status: When an error occurs, use the FROM command to read out the details of the error.
Bit Name Status when bit is set to “1" (turned on) Status when bit is set to ”0"
(turned off)
b0 Error Error if any of b1 through b4 is turned on No error
b1 O/G error Offset/gain data in EEPROM is abnormal or a
data setting error occurs. Offset/Gain data normal
b2 Power supply error 24V DC power failure Power supplied normally
b3 Hardware error Defective D/A converter or other hardware Non-detective hardware
b10 Range error The digital input or analog output value is out of
the specified range.
The input or output value is in
the specified range.
b12 G/O-Adjustment
prohibit status BFM #21 is not set to “1". Adjustable status
(BFM #21 = 1)
Bits b4 through b9, b11, b13 through b15 are not defined.
➈[BFM #30]The identification code for a special block is read using the FROM command.The identification code for
the FX2N-4DA unit is K3020.The MPU can use this facility in the program to identify the special block before
commencing any data transfer from and to the special block.
Note : BFM #’s marked E/(E).
•Values of BFM #0, #5, and #21, (marked E) are stored in EEPROM memory of the FX2N-4DA. BFM #10 to #17 are
copied to EEPROM when the gain/offset setting command BFM #8, #9 is used. Also, BFM #20 causes resetting of
the EEPROM memory. The EEPROM has a life of about 10,000 cycles (changes), so do not use programs which
frequently change these BFMs.
•A mode change of BFM #0 automatically involves a change of the corresponding offset and gain values. Because
of the time needed to write the new values to the internal EEPROM memory, a delay of 3 s is required between in-
structions changing BFM #0 and instructions writing to the corresponding BFM #10 through BFM #17.
Therefore, a delay timer should be used before writing to BFM #10 through #17.
If the factory-set I/O characteristics are not changed and the status information is not used, you can operate the
FX2N-4DA using the following simple program. For the FROM and TO commands, refer to the FX Programming Manual.
CH1 and CH2: Voltage output mode (-10 V to +10 V)
CH3: Current output mode (+4 mA to +20 mA)
CH4: Current output mode (0 mA to +20 mA)
(H2100) →BFM #0
CH1 and CH2: Voltage output CH3: Current output (+4mA to
+20 mA) CH4: Current output (0 mA to +20 mA)
Write data in respective data registers while observing the
following ranges:
Data register D0 and D1: -2,000 to +2,000 Data registers D2 and
D3: 0 to +1,000
Data register D0 →BFM #1 (output to CH1)
Data register D1 →BFM #2 (output to CH2)
Data register D2 →BFM #3 (output to CH3)
Data register D3 →BFM #4 (output to CH4)
Operation procedure
➀Turn off the power of the MPU, and then connect the FX2N-4DA. After that, wire the I/O lines of the FX2N-4DA.
➁Set the MPU to STOP, and turn on the power. Write the above program then switch the MPU to RUN.
➂Analog values will be sent from D0 (BFM #1), D1 (BFM #2), D2 (BFM #3), and D3 (BFM #4) to the respective output
channels of the FX2N-4DA. When the MPU is in STOP, the analog values set before stopping the MPU will remain
output. (The output will be held.)
➃When the MPU is in STOP, the offset values can also be output. For a detailed description, refer to Section 5, ➂.
Program example
For the following program, CH1 and CH2 of the FX2N-4DA connected at special block position No. 1 are used as
voltage output channels, CH3 as a current output channel (+4 mA to +20 mA), and CH4 as a current output channel (0
mA to +20 mA). When the MPU is in STOP, the output will be held. In addition, the status information is used.
BFM #30 data (model code) of block No. 1 Transferred to data
register D4.
M1 will be turned on when the model code is set to K3020
(FX2N-4DA).
H2100 →BFM #0 (unit No.1)
CH1 and CH2: Voltage output CH3: Current output (+4 mA to
+20 mA) CH4: Current output (0 mA to +20 mA)
D0 →BFM #1 (CH1 output)
D1 →BFM #2 (CH2 output)
D2 →BFM #3 (CH3 output)
D3 →BFM #4 (CH4 output)
BFM #29 (b15 to b0) →(M25 to M10)
Reads out the status data.
Output data abnormal
➀Check whether the output wiring and/or expansion cables are properly connected on FX2N-4DA analog special
function block.
➁Check that the FX2N system configuration rules have not been broken, i.e. the number of blocks does not exceed 8
and the total system I/O is equal or less than 256 I/O.
➂Ensure that the correct output mode has been selected for the application.
➃Check that there is no power overload on either the 5V or 24V power source, remember the loading on the FX2N
MPU or a powered extension unit varies according to the number of extension blocks or special function blocks
connected.
➄Put the main processing unit into RUN.
➅After turning on or off the 24 VDC power for analog signals, the analog output may fluctuate for approximately 1
second. This is due to time delays in the power supply from the MPU or differences in start time. For this reason,
be sure to take preventive measures so that this output fluctuation will not affect the external units.
[Example of preventive measure]
I/O characteristics
The standard characteristics (factory default) are shown by the solid lines in the figure below. These characteristics can
be adjusted according to the conditions of the user’s system.
●. . . Gain value : Analog output value when the digital input is +1,000
▲. . . Offset value : Analog output value when the digital input is 0
When the slope of the I/O characteristic line is steep: Slight changes to the digital input will greatly increase or reduce
the analog output.
When the slope of the I/O characteristic line is gentle: Slight changes to the digital input will not always change the
analog output.
Note that the resolution (minimum possible change of analog output) of the FX2N-4DA is fixed.
Adjustment of I/O Characteristics
To adjust the I/O characteristics, set the offset and gain of the FX2N-4DA either using push button switches connected
to input terminals of the programmable controller or using the forced on/off function of a programming panel. To change
the offset and gain, just change the conversion constants of the FX2N-4DA. Metering of the analog output is not needed
for adjustment, however a program should be created in the MPU.
An example program for adjustment is shown below. The example shows that for channel CH2 of FX2N-4DA block No.
1, the offset value is changed to 7 mA, and the gain value to 20 mA. Note that for CH1, CH3, and CH4, the standard
voltage output characteristics are set.
OPERATION START
(H0010)→BFM#0 Sets the
mode of the output channel.
(K1)→BFM#21
Permits adjustment of I/O
characteristics.
(K7000)→BFM#12
Sets the offset data. (Offset value: 7 mA)
(K20000)→BFM#13
Sets the gain data. (Gain value: 20 mA)
(H1100)→BFM#8
CH2 offset/gain setting command
OPERATION END
(K2)→BFM#21
Inhibits adjustment of I/O characteristics
Outline of FROM and TO commands: For a detailed description, refer to the FX Programming Manual.
m1 : Special unit or block number (K0 to K7, numbered from the MPU)
m2 : Buffer memory head address (K0 to K31)
D•: Head device number of destination data. T, C, D, KnM, KnY, KnS, V, and Z can be used to designate the
head device. Each device number can be qualified using an index.
n : Number of transfer points (K1 to K32) (K1 to K16 for 32-bit command)
m1,m2,n : Same as above
S•: Head device number of source data. T, C, D, KnX, KnM, KnY, KnS, V, Z, K, and H can be used to
designate the head device. Each device number can be qualified using an index.
•When X010 and X011 are off, transfer will not be executed, therefore the destination data value will not be changed.
If the FX2N-4DA does not operate properly, check the following items
➀Check the external wiring. Refer to section 3 of this manual.
➁Check status of the POWER indicator lamp (LED) of the FX2N-4DA.
On : The extension cable is properly connected.
Off or flash : Check connection of extension cable. Also check the 5 V power supply capacity.
➂Check status of the 24 V power indicator lamp (LED) of the FX2N-4DA.
On : 24 VDC is supplied.
Off : Supply 24 VDC (+10%) to the FX2N-4DA.
➃Check the status of the D/A conversion indicator lamp (LED) of the FX2N-4DA.
Flash : D/A conversion is normal.
On or off : The ambient conditions are not suitable for the FX2N-4DA, or the FX2N-4DA is defective.
➄Check that the external load resistance connected to each analog output terminal does not exceed the capacity of
the FX2N-4DA drive (voltage output: 2kΩto 1 MΩ/ current output: 500Ω).
➅Check the output voltage or current value using a voltmeter or ammeter, and confirm that the output meets the I/O
characteristics. If the output does not meet the I/O characteristics, adjust the offset and gain again. Refer to
section 8.
Note
To test the withstand voltage of the FX2N-4DA, connect all the terminals to the grounding terminal.
Guidelines for the safety of the user and protection of the FX2N-4DA 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-4DA 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-4DA 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.
HEAD OFFICE:MITSUBISHI DENKI BLDG MARUNOUCHI TOKYO 100 TELEX:J24532 CABLE MELCO TOKYO
HIMEJI WORKS:840, CHIYODA CHO, HIMEJI, JAPAN
JY992D65901A
Effective JUN. 1997
Specifications are subject to
change without notice
FROM K1 K30 D4 K1
CMP K3020 D4 M0
TO K1 K0 H2100 K1
P
M1
TO K1 K1 D0 K4
Set the data to
M10 M20
No error In specified
output range
M8000
RUN
monitor
D0 and D1 = -2,000 to +2,000
D2 and D3 = 0 to +1,000
FROM K1 K29 K4M10 K1
M3
M8002
initial pulse
TO K1 K0 H2100 K1
Write the data for CH1 to D0, CH2 to D1,
CH3 to D2 and CH4 to D3.
TO K1 K1 D0 K4
M8000
RUN
monitor
X010
SET M0
TO K1 K0 H0010 K1
P
TO K1 K21 K1 K1
P
M0
T0
TO K1 K12 K7000 K1
P
TO K1 K13 K20000 K1
P
TO K1 K8 H1100 K1
T0
T1
TO K0 K21 K2 K1
P
T1
RST M0
P
K30
K30
Standard characteristics
of voltage output
Standard characteristics of current
output (+4mA to +20mA)
Standard characteristics of current
output (0mA to +20mA)
6
7
8 9
24V DC power
s upply
F X -4DA s pe cia l
function block
2N
Ana log data cut
off circuit
E xternal
analog unit
P ower s witch
Ana log
output
Digital input
+10V
+10. 235V
-2, 00 0
+2,000
-10 V
-10 .2 4V
-2, 04 8
+2,047
+5V
outputmode0
+1,000
Ana log
output
+4mA
Digital input
+20mA
0+1,000
Outputmode 1
Ana log
output
+20mA
0
Digital input
+1,000
Outputmode2
After adjustment, the I/O
characteristics will be as follows
Digital input
+1,000
A
nalog
o
utput
+7mA
+20mA
0
FNC 78
FROM
D P
X010
Read command
FROM K1 K30 D0 K1
Read BFM
BFM #30 of special unit No.1® D0
m1 m2 D× n
FNC 79
TO
D P
X011
Write command
TO K1 K1 D2 K2
Write BFM
D2 and D3® BFM #1 and #2
of special unit No.1
m1 m2 n
S×
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操作和编程示范
操作上的警示
Ｉ／Ｏ调节器的说明 故障排除