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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 -)
31
FNC277-FNC279
Data
Transfer 3
32
FNC280-FNC289
High-Speed
Processing 2
33
FNC290-FNC299
Extension File
Register Control
34
FNC300-FNC305
FX
3U
-CF-ADP
35
SFC•STL
Programming
36
Interrupt
Function
37
Special Device
38
Error Code
A
Version Up
Information
B
Execution Times
RS2 (FNC 87) [ch1] (Refer to Data Communication Edition for details.)
[M]8400 Not used – – – – – – –––––
[M]8401
*1
RS2 (FNC 87) [ch1] Send wait flag – –––––
M 8402
*1
RS2 (FNC 87) [ch1] Send request D8402–––––
M 8403
*1
RS2 (FNC 87) [ch1] Receive complete flag D8403–––––
[M]8404 RS2 (FNC 87) [ch1] Carrier detection flag – –––––
[M]8405 RS2 (FNC 87) [ch1] Data set ready (DSR) flag
*3
*3
– –––––
[M]8406 to [M]8408 Not used – – – – – – –––––
M 8409 RS2 (FNC 87) [ch1] Time-out check flag – –––––
RS2 (FNC 87) [ch2] and Computer Link [ch2] (Refer to the Data Communication Edition for details.)
[M]8410 to [M]8420 Not used – – – – – – –––––
[M]8421
*2
RS2 (FNC 87) [ch2] Send wait flag – – –––––
M 8422
*2
RS2 (FNC 87) [ch2] Send request – D8422–––––
M 8423
*2
RS2 (FNC 87) [ch2] Receive complete flag – D8423–––––
[M]8424 RS2 (FNC 87) [ch2] Carrier detection flag – – –––––
[M]8425 RS2 (FNC 87) [ch2] Data set ready (DSR) flag –
*3
*3
– –––––
[M]8426 Computer link [ch2] Global ON –
D8427
D8428
D8429
–––––
[M]8427
Computer link [ch2]
On-demand send processing
– –––––
M 8428 Computer link [ch2] On-demand error flag – –––––
M 8429
Computer link [ch2]
On-demand Word / Byte changeover
RS2 (FNC 87) [ch2]
Time-out check flag
– –––––
*1. These devices are cleared when the PLC mode switches from RUN to STOP or when the RS2 instruction
[ch1] turns OFF.
*2. These devices are cleared when the PLC mode switches from RUN to STOP or when the RS2 instruction
[ch2] turns OFF.
*3. Available in Ver. 2.30 or later.
MODBUS communication [ch1] (Refer to MODBUS Communication Edition for details.)
[M]8401 MODBUS request in process
*4
*5
*5
– –––––
[M]8402 MODBUS communication error
*4
*5
*5
D8402–––––
[M]8403 MODBUS communication error (latched)
*4
*5
*5
D8403–––––
[M]8404 Listen only mode – – –
*5
*5
– –––––
[M]8405 to [M]8407 Not used – – – – – – –––––
[M]8408 Retry
*4
*5
*5
– –––––
[M]8409 Timeout
*4
*5
*5
– –––––
[M]8410 Not used – – – – – – –––––
MODBUS communication [ch2] (Refer to MODBUS Communication Edition for details.)
[M]8421 MODBUS request in process –
*4
*5
*5
– –––––
[M]8422 MODBUS communication error –
*4
*5
*5
D8422–––––
[M]8423 MODBUS communication error (latched) –
*4
*5
*5
D8423–––––
[M]8424 Listen only mode – – –
*5
*5
– –––––
[M]8425 to [M]8427 Not used – – – – – – –––––
[M]8428 Retry –
*4
*5
*5
– –––––
[M]8429 Timeout –
*4
*5
*5
– –––––
[M]8430 Not used
– – – – – – –––––
MODBUS communication [ch1, ch2] (Refer to MODBUS Communication Edition for details.)
M 8411 MODBUS configuration request flag
*4
*5
*5
– –––––
*4. Available in Ver. 1.30 or later.
*5. Available in Ver. 2.40 or later.
Number and
name
Operation and function
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