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FX3S/FX3G/FX3GC/FX3U/FX3UC 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
– – –––––
D 8421 Computer link [ch2] Station number setting – – –––––
[D]8422
*1
RS2 (FNC 87) [ch2]
Remaining points of transmit data
– M8422 – – – – –
[D]8423
*1
RS2 (FNC 87) [ch2]
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
–
M8426 to
M8429
–––––
D 8428
Computer link [ch2]
Specification of on-demand data length
register
– –––––
D 8429
RS2 (FNC 87) [ch2], computer link [ch2]
Time-out time setting
– –––––
D 8430
RS2 (FNC 87) [ch2]
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>
– – –––––
D 8433 RS2 (FNC 87) [ch2] Terminator 3 and 4 – – –––––
[D]8434
RS2 (FNC 87) [ch2]
Receive sum (received data)
– – –––––
[D]8435
RS2 (FNC 87) [ch2]
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