Mitsubishi Electronics FX3G User Manual
858
FX
3S
/FX
3G
/FX
3GC
/FX
3U
/FX
3UC
Series
Programming Manual - Basic & Applied Instruction Edition
37 Operation of Special Devices (M8000 -, D8000 -)
37.1 Special Device List (M8000 -, D8000 -)
RS2 (FNC 87) [ch2] and Computer Link [ch2] (Refer to Data Communication Edition for details.)
D 8420
RS2 (FNC 87) [ch2]
Communication format setting
Communication format setting
–
–
–
–
–
–
–
D 8421
Computer link [ch2] Station number setting
–
–
–
–
–
–
–
[D]8422
*1
RS2 (FNC 87) [ch2]
Remaining points of transmit data
Remaining points of transmit data
–
M8422
–
–
–
–
–
[D]8423
*1
RS2 (FNC 87) [ch2]
Monitoring receive data points
Monitoring receive data points
–
M8423
–
–
–
–
–
[D]8424
Not used
–
–
–
–
–
–
–
–
–
–
–
[D]8425
Communication parameter display [ch2]
–
–
–
–
–
–
–
[D]8426
Not used
–
–
–
–
–
–
–
–
–
–
–
D 8427
Computer link [ch2]
Specification of on-demand head device
register
Specification of on-demand head device
register
–
M8426 to
M8429
–
–
–
–
–
D 8428
Computer link [ch2]
Specification of on-demand data length
register
Specification of on-demand data length
register
–
–
–
–
–
–
D 8429
RS2 (FNC 87) [ch2], computer link [ch2]
Time-out time setting
Time-out time setting
–
–
–
–
–
–
D 8430
RS2 (FNC 87) [ch2]
Header 1 and 2 <Default: STX>
Header 1 and 2 <Default: STX>
–
–
–
–
–
–
–
D 8431
RS2 (FNC 87) [ch2] Header 3 and 4
–
–
–
–
–
–
–
D 8432
RS2 (FNC 87) [ch2]
Terminator 1 and 2 <Default: ETX>
Terminator 1 and 2 <Default: ETX>
–
–
–
–
–
–
–
D 8433
RS2 (FNC 87) [ch2] Terminator 3 and 4
–
–
–
–
–
–
–
[D]8434
RS2 (FNC 87) [ch2]
Receive sum (received data)
Receive sum (received data)
–
–
–
–
–
–
–
[D]8435
RS2 (FNC 87) [ch2]
Receive sum (calculated result)
Receive sum (calculated result)
–
–
–
–
–
–
–
[D]8436
RS2 (FNC 87) [ch2] Send sum
–
–
–
–
–
–
–
[D]8437
Not used
–
–
–
–
–
–
–
–
–
–
–
*1.
Cleared when the PLC switches from RUN to STOP.
MODBUS communication [ch1] (Refer to MODBUS Communication Edition for details.)
D 8400
Communication format
*2
*3
*3
–
–
–
–
–
–
D 8401
Protocol
*2
*3
*3
–
–
–
–
–
–
D 8402
Communication error code
*2
*3
*3
M8402
–
–
–
–
–
D 8403
Error details
*2
*3
*3
M8403
–
–
–
–
–
D 8404
Error step number
*2
*3
*3
–
–
–
–
–
–
[D]8405
Communication format display
*2
*3
*3
–
–
–
–
–
–
D 8406
ASCII input delimiter
–
–
–
*3
*3
–
–
–
–
–
–
[D]8407
Step number being executed
*2
*3
*3
–
–
–
–
–
–
[D]8408
Current retry value
*2
*3
*3
–
–
–
–
–
–
D 8409
Slave response timeout
*2
*3
*3
–
–
–
–
–
–
D 8410
Turn around delay
*2
*3
*3
–
–
–
–
–
–
D 8411
Message to message delay
*2
*3
*3
–
–
–
–
–
–
D 8412
Number of retries
*2
*3
*3
–
–
–
–
–
–
D 8414
Slave node address
*2
*3
*3
–
–
–
–
–
–
D 8415
Communication status information setup
–
–
–
*3
*3
–
–
–
–
–
–
D 8416
Communication status device range setup
–
–
–
*3
*3
–
–
–
–
–
–
[D]8419
Communication mode
*2
*3
*3
–
–
–
–
–
–
*2.
Available in Ver. 1.30 or later.
*3.
Available in Ver. 2.40 or later.
Number and
name
Content of register
Applicable model
FX
3S
FX
3G
FX
3GC
FX
3U
FX
3UC
Correspond-
ing special
device
FX
1S
FX
1N
FX
1NC
FX
2N
FX
2NC