FX3U Series Programmable Controllers
User’s Manual - Hardware Edition
447
A Operation of Special Devices (M8000 -, D8000 -)
A-1 Special Auxiliary Relay (M8000 to M8511)
21
Memory
Cassette
22
Battery
A
Special Devices
(M8000-,D8000-)
B
Instruction List
C
Character-code
D
Discontinued
models
Positioning
[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
*1
[Y001] Interrupt signal logic
reverse
–
[M]8358
[Y001] Positioning instruction
activation
–
M 8359
*1
[Y001] Pulse output stop command –
[M]8360
[Y002] Pulse output monitor
(ON: BUSY/ OFF: READY)
–
M 8361
*1
[Y002] Clear signal output function
enable
–
M 8362
*1
[Y002] Zero return direction
specification
–
M 8363 [Y002] Forward limit –
M 8364 [Y002] Reverse limit –
M 8365
*1
[Y002] DOG signal logic reverse –
M 8366
*1
[Y002] Zero point signal logic
reverse
–
M 8367
*1
[Y002] Interrupt signal logic
reverse
–
[M]8368
[Y002] Positioning instruction
activation
–
M 8369
*1
[Y002] Pulse output stop command –
[M]8370
*2
[Y003] Pulse output monitor
(ON: BUSY/ OFF: READY)
–
M 8371
*1
*2
[Y003] Clear signal output function
enable
–
M 8372
*1
*2
[Y003] Zero return direction
specification
–
M 8373
*2
[Y003] Forward limit –
M 8374
*2
[Y003] Reverse limit –
M 8375
*1
*2
[Y003] DOG signal logic reverse –
M 8376
*1
*2
[Y003] Zero point signal logic
reverse
–
M 8377
*1
*2
[Y003] Interrupt signal logic
reverse
–
[M]8378
*2
[Y003] Positioning instruction
activation
–
M 8379
*1
*2
[Y003] Pulse output stop command
–
*1. Cleared when PLC switches from RUN to STOP.
*2. Available only when two FX
3U-2HSY-ADP units are
connected to an FX
3U PLC.
Number and
name
Operation and function
Correspond-
ing special
device
High Speed Counter Function
[M]8380
*3
Operation status of C235, C241,
C244, C246, C247, C249, C251,
C252, and C254
–
[M]8381
*3
Operation status of C236 –
[M]8382
*3
Operation status of C237, C242,
and C245
–
[M]8383
*3
Operation status of C238, C248,
C248 (OP), C250, C253, and C255
–
[M]8384
*3
Operation status of C239 and C243 –
[M]8385
*3
Operation status of C240 –
[M]8386
*3
Operation status of C244 (OP) –
[M]8387
*3
Operation status of C245 (OP) –
[M]8388
Contact for high speed counter
function change
–
M 8389 External reset input logic reverse –
M 8390
Function changeover device for
C244
–
M 8391
Function changeover device for
C245
–
M 8392
Function changeover device for
C248 and C253
–
*3. Cleared when PLC switches from STOP to RUN.
Interrupt Program
[M]8393 Contact for delay time setting D8393
[M]8394
HCMOV (FNC189):
Drive contact for interrupt program
–
[M]8395
Not used
–
[M]8396 –
[M]8397 –
Ring Counter
M 8398
Ring counter operation
(in units of 1ms, 32 bits)
*4
D8398,
D8399
[M]8399 Not used –
*4. 1ms ring counter (D8399, D8398) will operate after M8398
turns ON.
RS2 (FNC 87) [ch1]
[M]8400 Not used –
[M]8401
*5
RS2 (FNC 87) [ch1] Send wait flag –
M 8402
*5
RS2 (FNC 87) [ch1] Send request D8402
M 8403
*5
RS2 (FNC 87) [ch1]
Receive complete flag
D8403
[M]8404
RS2 (FNC 87) [ch1]
Carrier detection flag
–
[M]8405
*6
RS2 (FNC 87) [ch1]
Data set ready (DSR) flag
–
[M]8406
Not used
–
[M]8407 –
[M]8408 –
M 8409
RS2 (FNC 87) [ch1]
Time-out check flag
–
*5. Cleared when PLC switches from RUN to STOP or when
RS2 instruction [ch1] is OFF.
*6. Supported in Ver. 2.30 or later
Number and
name
Operation and function
Correspond-
ing special
device
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