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Appendix A: Special Device List
191
FX3S Series Programmable Controllers
User's Manual - Hardware Edition
11
Built-in Analog
12
Output Wiring
13
Wiring for
Various Uses
14
Test Run,
Maintenance,
Troubleshooting
15
Other Extension
Units and
Options
16
Display Module
(FX
3S
-5DM)
17
Memory
Cassette
A
Special Devices
(M8000-, D8000-)
B
Instruction List
C
Discontinued
models
Appendix A-1 Special Auxiliary Relay (M8000 to M8511)
*1. Cleared when PLC switches from RUN to STOP.
*2. 1 ms ring counter (D8399, D8398) will operate after
M8398 turns ON.
*3. Cleared when PLC switches from RUN to STOP or
when RS2 instruction [ch1] is OFF.
*4. Used when the SNTP function setting is set to "Use"
in the time setting parameters.
Number and name Operation and function
Correspond-
ing special
device
Positioning
[M]8330 to [M]8337 Not used -
M 8338
*1
PLSV instruction (FNC157):
Acceleration/deceleration operation
-
[M]8339 Not used -
[M]8340
[Y000] Pulse output monitor
(ON: BUSY/ OFF: READY)
-
M 8341
*1
[Y000] Clear signal output function
enable
-
M 8342
*1
[Y000] Zero return direction
specification
-
M 8343 [Y000] Forward limit -
M 8344 [Y000] Reverse limit -
M 8345
*1
[Y000] DOG signal logic reverse -
M 8346
*1
[Y000] Zero point signal logic
reverse
-
M 8347 Not used -
[M]8348
[Y000] Positioning instruction
activation
-
M 8349
*1
[Y000] Pulse output stop command -
[M]8350
[Y001] Pulse output monitor
(ON: BUSY/ OFF: READY)
-
M 8351
*1
[Y001] Clear signal output function
enable
-
M 8352
*1
[Y001] Zero return direction
specification
-
M 8353 [Y001] Forward limit -
M 8354 [Y001] Reverse limit -
M 8355
*1
[Y001] DOG signal logic reverse -
M 8356
*1
[Y001] Zero point signal logic
reverse
-
M 8357 Not used -
[M]8358
[Y001] Positioning instruction
activation
-
M 8359
*1
[Y001] Pulse output stop command -
[M]8360 to [M]8369 Not used -
High-speed counter function
[M]8380 to [M]8387 Not used -
[M]8388
Contact for high-speed counter
function change
-
[M]8389 to [M]8391 Not used -
M 8392
Function changeover device for
C248 and C253
-
[M]8393 to [M]8397 Not used -
Ring counter
M 8398
Ring counter operation
(in units of 1 ms, 32 bits)
*2
D8398
D8399
[M]8399 Not used -
Number and name Operation and function
Correspond-
ing special
device
RS2 instruction (FNC 87) [ch1]
[M]8400 Not used -
[M]8401
*3
RS2 instruction (FNC 87) [ch1]
Send wait flag
-
M 8402
*3
RS2 instruction (FNC 87) [ch1]
Send request
D8402
M 8403
*3
RS2 instruction (FNC 87) [ch1]
Receive complete flag
D8403
[M]8404
RS2 instruction (FNC 87) [ch1]
Carrier detection flag
-
[M]8405
RS2 instruction (FNC 87) [ch1]
Data set ready (DSR) flag
-
[M]8406 to [M]8408 Not used -
M 8409
RS2 instruction (FNC 87) [ch1]
Time-out check flag
-
[M]8410 to [M]8420 Not used -
MODBUS communication [ch1]
[M]8401 MODBUS request in process -
[M]8402 MODBUS communication error D8402
[M]8403
MODBUS communication error
(latched)
D8403
[M]8404 to [M]8407 Not used -
[M]8408 Retry -
[M]8409 Timeout -
[M]8410 Not used -
M 8411 MODBUS configuration request flag -
FX3U-ENET-ADP [ch1]
[M]8404 FX3U-ENET-ADP unit ready -
[M]8405 Not used -
[M]8406
*4
Time setting execution -
[M]8407 to [M]8410 Not used -
M 8411
*4
Execute time setting -
Positioning
[M]8460 to [M]8463 Not used -
M 8464
DSZR instruction (FNC150),
ZRN instruction (FNC156)
[Y000] Clear signal device
specification function enabled
D8464
M 8465
DSZR instruction (FNC150),
ZRN instruction (FNC156)
[Y001] Clear signal device
specification function enabled
D8465
[M]8466 to [M]8467 Not used -
Error detection
[M]8468 to [M]8486 Not used -
[M]8487 USB communication error D8487
[M]8488 Not used -
[M]8489 Special parameter error D8489