812
FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
36 Operation of Special Devices (M8000 -, D8000 -)
36.1 Special Device List (M8000 -, D8000 -)
Positioning [FX
3U
PLCs] (Refer to Positioning Control Manual for details.)
[M]8370
[Y003] Pulse output monitor (ON: BUSY/ OFF: READY)
3
*2
–
–
–
–
–
–
–
M 8371
*1
[Y003] Clear signal output function enable
3
*2
–
–
–
–
–
–
–
M 8372
*1
[Y003] Zero return direction specification
3
*2
–
–
–
–
–
–
–
M 8373
[Y003] Forward limit
3
*2
–
–
–
–
–
–
–
M 8374
[Y003] Reverse limit
3
*2
–
–
–
–
–
–
–
M 8375
*1
[Y003] DOG signal logic reverse
3
*2
–
–
–
–
–
–
–
M 8376
*1
[Y003] Zero point signal logic reverse
3
*2
–
–
–
–
–
–
–
M 8377
*1
[Y003] Interrupt signal logic reverse
3
*2
–
–
–
–
–
–
–
[M]8378
[Y003] Positioning instruction activation
3
*2
–
–
–
–
–
–
–
M 8379
*1
[Y003] Pulse output stop command
3
*2
–
–
–
–
–
–
–
*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.
High Speed Counter Function (Refer to Subsection 4.7.5 for details.)
[M]8380
*3
Operation status of C235, C241, C244, C246, C247,
C249, C251, C252, and C254
3
3
–
–
–
–
–
–
[M]8381
*3
Operation status of C236
3
3
–
–
–
–
–
–
[M]8382
*3
Operation status of C237, C242, and C245
3
3
–
–
–
–
–
–
[M]8383
*3
Operation status of C238, C248, C248 (OP), C250,
C253, and C255
3
3
–
–
–
–
–
–
[M]8384
*3
Operation status of C239 and C243
3
3
–
–
–
–
–
–
[M]8385
*3
Operation status of C240
3
3
–
–
–
–
–
–
[M]8386
*3
Operation status of C244 (OP)
3
3
–
–
–
–
–
–
[M]8387
*3
Operation status of C245 (OP)
3
3
–
–
–
–
–
–
[M]8388
Contact for high speed counter function change
3
3
–
–
–
–
–
–
M 8389
External reset input logic reverse
3
3
–
–
–
–
–
–
M 8390
Function changeover device for C244
3
3
–
–
–
–
–
–
M 8391
Function changeover device for C245
3
3
–
–
–
–
–
–
M 8392
Function changeover device for C248 and C253
3
3
–
–
–
–
–
–
*3.
Cleared when PLC switches from STOP to RUN.
Interrupt Program
[M]8393
Contact for delay time setting
3
3
D8393
–
–
–
–
–
[M]8394
HCMOV (FNC189): Drive contact for interrupt
program
3
3
–
–
–
–
–
–
[M]8395
Not used
–
–
–
–
–
–
–
–
[M]8396
–
–
–
–
–
–
–
–
[M]8397
–
–
–
–
–
–
–
–
Ring Counter
M 8398
Ring counter operation (in units of 1ms, 32 bits)
*4
3
3
D8398,
D8399
–
–
–
–
–
[M]8399
Not used
–
–
–
–
–
–
–
–
*4.
1ms ring counter (D8399, D8398) will operate after M8398 turns ON.
Number and name
Operation and function
Applicable model
FX
3U
FX
3UC
Correspond-
ing special
device
FX
1S
FX
1N
FX
2N
FX
1NC
FX
2NC