854
FX
3G
/FX
3U
/FX
3UC
Series Programmable Controllers
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
3
3
3
–
–
–
–
–
–
D 8421
Computer link [ch2] Station number setting
3
3
3
–
–
–
–
–
–
[D]8422
*1
RS2 (FNC 87) [ch2] Remaining points of transmit
data
3
3
3
M8422
–
–
–
–
–
[D]8423
*1
RS2 (FNC 87) [ch2] Monitoring receive data points
3
3
3
M8423
–
–
–
–
–
[D]8424
Not used
–
–
–
–
–
–
–
–
–
[D]8425
Communication parameter display [ch2]
3
3
3
–
–
–
–
–
–
[D]8426
Not used
–
–
–
–
–
–
–
–
–
D 8427
Computer link [ch2]
Specification of on-demand head device register
3
3
3
M8426 to
M8429
–
–
–
–
–
D 8428
Computer link [ch2]
Specification of on-demand data length register
3
3
3
–
–
–
–
–
D 8429
RS2 (FNC 87) [ch2], computer link [ch2]
Time-out time setting
3
3
3
–
–
–
–
–
D 8430
RS2 (FNC 87) [ch2]
Header 1 and 2 <Default: STX>
3
3
3
–
–
–
–
–
–
D 8431
RS2 (FNC 87) [ch2] Header 3 and 4
3
3
3
–
–
–
–
–
–
D 8432
RS2 (FNC 87) [ch2] Terminator 1 and 2
<Default: ETX>
3
3
3
–
–
–
–
–
–
D 8433
RS2 (FNC 87) [ch2] Terminator 3 and 4
3
3
3
–
–
–
–
–
–
[D]8434
RS2 (FNC 87) [ch2] Receive sum (received data)
3
3
3
–
–
–
–
–
–
[D]8435
RS2 (FNC 87) [ch2]
Receive sum (calculated result)
3
3
3
–
–
–
–
–
–
[D]8436
RS2 (FNC 87) [ch2] Send sum
3
3
3
–
–
–
–
–
–
[D]8437
Not used
–
–
–
–
–
–
–
–
–
*1.
Cleared when the PLC switches from RUN to STOP.
FX
3U
-CF-ADP [ch1] (Refer to CF-ADP Manual for details.)
[D]8400 to [D]8401
Not used
–
–
–
–
–
–
–
–
–
[D]8402
Step number of executing CF-ADP instruction
*3
–
3
*2
3
*2
–
–
–
–
–
–
[D]8403
–
3
*2
3
*2
–
–
–
–
–
–
[D]8404 to [D]8405
Not used
–
–
–
–
–
–
–
–
–
[D]8406
CF-ADP status
–
3
*2
3
*2
–
–
–
–
–
–
[D]8407
Not used
–
–
–
–
–
–
–
–
–
[D]8408
CF-ADP version
–
3
*2
3
*2
–
–
–
–
–
–
[D]8409 to [D]8413
Not used
–
–
–
–
–
–
–
–
–
[D]8414
Error step number of M8418
*2
–
3
*2
3
*2
–
–
–
–
–
–
[D]8415
–
3
*2
3
*2
–
–
–
–
–
–
[D]8416
Not used
–
–
–
–
–
–
–
–
–
[D]8417
Error code in detail for CF-ADP instructions
*3*4
–
3
*2
3
*2
–
–
–
–
–
–
[D]8418
Error code for CF-ADP instructions
*3*4
–
3
*2
3
*2
–
–
–
–
–
–
[D]8419
Operation mode display
–
3
*2
3
*2
–
–
–
–
–
–
*2.
Available in Ver. 2.61 or later.
*3.
Cleared when the PLC switches from STOP to RUN.
*4.
For details on the error code is stored in special data register, refer to the CF-ADP Manual.
Number and name
Content of register
Applicable model
FX
3G
FX
3U
FX
3UC
Correspond-
ing special
device
FX
1S
FX
1N
FX
2N
FX
1NC
FX
2NC