Mitsubishi Electric MELSEC FX2N-4da Handbook

思南工控
资料提供
FX -4DA
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This manual contains text, diagrams and explanations which will guide the reader in the correct installation and
operation of the FX -4DA special function block and should be read and understood before attempting to install or use
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the unit.
Further information can be found in the FX PROGRAMMING MANUAL, FX
1
引言
•
The FX -4DA analog special function block has four output channels. The output channels take a digital value and
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output an equivalent analog signal. This is called a D/A conversion. The FX
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 FX -4DA and the FX main unit is by buffer memory exchange. There are 32 buffer
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memories (each of 16 bits) in the FX -4DA.
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•
The FX -4DA occupies 8 points of I/O on the FX expansion bus. The 8 points can be allocated from either inputs
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or outputs. The FX -4DA draws 30mA from the 5V rail of the FX main unit or powered extension unit.
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2
外部端子和部件
87(3.43) 55(2.17)
4(0.16)
1
9
8
7
9(0.35) 4(0.16)
G Weight : Approx. 0.3 kg (0.66 lbs) G Accessory: Special block number label
Œ Extension cable  24 V power indicator lamp (LED)
24 VDC power is supplied to the terminals of the
 Power indicator lamp (LED)
FX -4DA to light this indicator lamp.
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5 V power is supplied from the programmable
‘
controller to light this indicator lamp. D/A conversion indicator lamp (LED)
Flashes at a high speed if D/A conversion is
Ž Power supply terminals
performing without a problem.
(Screw terminal: M3 (0.12))
’
Hook for DIN rail

Analog output terminals
(Screw terminals : M3 (0.12)) “ Groove for DIN rail mounting
(Width of DIN rail : 35 mm 1.38")
”
Hole for direct mounting (2-φ4.5) (0.18)
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-
F OR M3(0.12)
nals. Firmly tighten the terminals to prevent abnormal operation.
3
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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 FX
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.
特殊功能模块
C O M X0
L N 24+ X X1
使用指南
F X -48MR -E S /U L
2N
Y 0 Y 2 Y 4
C O M1 Y 3 C O M2 Y 5
JY992D65901A
F X -48MR -E S /UL
2N
X000-X027
Y 000-Y 027
SERIES HARDWARE MANUAL .
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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.
DC 24V ±10% 200mA
-4DA has maximum resolution of 12
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*6
C las s 3
P C
G rounding
(100Ω or les s )
E xtens ion cable
*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: 100Ω or 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
ENVIRONMENTAL SPECIFICATIONS
55(2.17)
Environmental specifications (excluding following)
2
3
Dielectric withstand voltage
PERFORMANCE SPECIFICATIONS
Item
Analog output range
P OWE R
Digital input
Resolution
Total accuracy
Conversion speed
24V
Isolation
D/A
External power
5 4
6
supply
Number of occupied
I/O points
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
安装与接线
programmable controller (MPU), or connected to the right side of the other
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X2 X4 X6 X10 X14 X16 X20 X22 X24 C O M X 0 X 2 X 4
5 X7 X13 X15 X17 X21 X23 X25 L N 24+ X 1 X 3
P OW E R P OWE R
0 1 2 3 4 5 6 2 7 20 21 22 23 24 25 26 7
IN
10 11 12 13 14 15 16 17
P OW E R
T .V
P R OG .E
6 7 20 21 22 23 24 25 26 2 7
C P U.E F X -4AD F X -4DA
16 17 2N 2N
Y 6 Y 10 Y 14 Y 20 Y 22 Y 24 Y 26 C O M5 Y 0 Y 2 Y 4 Y 6
Y 7 C O M3 Y 13 C O M4 Y 15 Y 21 Y 23 Y 25 Y 27 C O M1 Y 1 Y 3 C O M2 Y 5 Y 7
A/D D/A
24V 24V
F X -4AD F X -16E X F X -4DA F X
2N 2N
2N 2N
X030
S pecial block S pecial block X050-X067
-X047
Y 030-Y 047
No.0 No.1
C H1
+15V V +
I +
24+
DC /DC
*1
AG *3 Inverter,etc.
V I - *2
converter
24-
Mixed output from the s ame channel is not pos s ible.
C H2
*4 +15V
V +
*5
I +
F X -4DA
2N V I -
*1
R ecorder,etc.
*2
*7
*4: Connect the terminal on the FX
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 FX -4DA.
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*6: The 24V DC service power of the programmable
controller can also be used.
*7: Do not connect any unit to the unused terminal
说明
Item Specification
Same as those for the FX main unit
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500V AC, 1min (between all terminals and ground)
Voltage output Current output
-10V DC to +10V DC (External load DC 0mA to +20mA (External load resistance:
resistance: 2kΩ to 1MΩ). 500Ω).
16 bits, binary, with sign (Effective bits for numeric value: 11 bits and sign bit (1 bit))
5mV (10V × 1/2000) 20µA (20mA × 1/1000)
±1% (at full scale of +10V) ±1% (at full scale of +20mA)
2.1ms for 4 channels (Change in the number of channels used will not change the conversion
speed.)
Photo-coupler isolation between analog and digital circuits.
DC/DC converter isolation of power from FX main unit.
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No isolation between analog channels.
24V DC ±10% 200mA
8 points taken from the FX expansion bus (can be either inputs or outputs)
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Mode 0 (Voltage Mode 1 (Current
At load resistance of 10kΩ
output: -10V to +10V) output: +4mA to +20mA)
+20mA
Analog
+10.235V output
+10V
Analog output +4mA
0
-2,000
+2,000
Mode 2 (Current
output: 0mA to +20mA)
Digital input
+20mA
-10V
-10.24V
Analog
output
Command sent from the programmable controller can
change the mode. The voltage/current output mode
0
selected will determine the output terminals used.
5
Data is transmitted between the FX
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BFM
#0 E Output mode select. Factory setting H0000
#1
Output data (Signed 16 bits binary: actual
#2
W value 11 bits + sign)
#3 #1: CH1, #2: CH2, #3: CH3, #4: CH4
X 6 X 10 X 12 X 14 X 16
X 5 X 7 X 11 X 13 X 15 X 17 #4
IN
P O W E R
0 1 2 3 4 5 6 7
10 11 12 13 14 15 16 17
P OWE R
#5 E Data holding mode. Factory setting H0000
OUT
0 1 2 3 4 5 6 7
10 11 12 13 14 15 16 17 #6, #7 Reserved
Y 10 Y 12 Y 14 Y 16
C O M3 Y 11 Y 13 C O M4 Y 15 Y 17
24V
A/D
Π[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
-32E R F X -4AD-P T
2N 1 (CH1), and the second digit for channel 2 (CH2) etc. The numeric values of these four digits respectively
represent the following items:
S pecial block
No.2
H
C H4 C H3 C H2 C H1
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

[BFM #1, #2, #3 and #4]: Output data channels CH1, CH2, CH3, and CH4
BFM #1: Output data of CH1 (Initial value: 0)
BFM #3: Output data of CH3 (Initial value: 0)
Ž
[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:
-4DA with the
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H
C H4 C H3 C H2 C H1
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 FX
the status of the FX -4DA to the programmable controller.
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BFM
#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
#11 Gain data CH1 *2
#12 Offset data CH2 *1
W
#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
#20(E) Initialize. initial value = 0
W
#21 E I/O characteristics adjustment inhibit (Initial value 1)
#22-#28 Reserved
#29 Error status
#30 K3020 identification code
#31 Reserved

[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.
At load resistance of 250Ω
BFM #8
H H
G 2 O2 G 1 O1 G 4

[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.
+1,000
‘
[BFM #20] Initialize: When K1 is written in BFM #20, all values will be initialized to the factory-settings.
Digital input
(Note that the BFM #20 data will override the BFM #21 data.) This initialize function is convenient if you have an
error in adjustment.
At load resistance of 250Ω
’
[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.
+1,000
Digital input
缓存（ＢＦＭ）的分配
-4DA and the MPU via buffer memories (16-bit 32-point RAM).
Buffer memories marked "W" can be written to
Description
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.
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).
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)
BFM #2: Output data of CH2 (Initial value: 0)
BFM #4: Output data of CH4 (Initial value: 0)
O = 0: Holds the output.
O = 1: Resets to the offset value.
-4DA, and report
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Description 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
Unit: mV or µA
*3
data (BFM #1 through #4) is 0
Initial offset value: 0
Output

Initial gain value: +5,000
mode 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.
BFM #9
O = 0: No changes done.
O = 1: Change data value.
O4 G 3 O3
(Program example : see section 8.)