Mitsubishi FX3G Series Programming Manual

828
FX3G/FX3U/FX3GC/FX3UC Series
Programming Manual - Basic & Applied Instruction Edition
37 Operation of Special Devices (M8000 -, D8000 -)
37.1 Special Device List (M8000 -, D8000 -)
Positioning [FX3U PLC] (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
– – –––– –
RS2 (FNC 87) [ch0] [FX3G, FX3GC PLCs] (Refer to Data Communication Edition for details.)
[M]8370 Not used
– – – – – –––– –
[M]8371
*1
RS2 (FNC 87) [ch0] instruction: Send wait flag
3 3 – – – –––– –
M 8372
*1
RS2 (FNC 87) [ch0] instruction: Send request
3 3 – – D8372 – – – – –
M 8373
*1
RS2 (FNC 87) [ch0] instruction: Receive
complete flag
3 3 – – D8373 – – – – –
[M] 8374 to [M] 8378 Not used
– – – – – –––– –
M 8379
RS2 (FNC 87) [ch0] instruction: Time-out check
flag
3 3 – – – –––– –
*1. These devices are cleared when the PLC mode switches from RUN to STOP or when the RS2 instruction
[ch0] turns OFF.
*2. Available only when two FX3U-2HSY-ADP units are connected to an FX3U PLC.
High-Speed Counter Function (Refer to Subsection 4.7.5 and 4.7.6 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 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 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 Function changeover device for C254
3 3 – – – –––– –
[M]8396
Not used
– – – – – –––– –
[M]8397
– – – – – –––– –
Ring Counter
M 8398
Ring counter operation (in units of 1ms, 32
bits)
*4
3 3 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 3G FX 3GC FX3U FX 3UC
Correspond-
ing special
device
FX 1S FX 1N FX 2N FX 1NC FX 2NC

Mitsubishi FX3G Series Specifications

General

Model	FX3G Series
Power Supply	AC 100-240V or DC 24V
Program Capacity	32, 000 steps
Execution Speed	0.21 µs/basic instruction
Communication Options	RS-422, USB, Ethernet
Expansion Modules	Analog, digital, communication
Programming Language	Ladder Logic, Instruction List
Built-in Functions	High-speed counters, pulse output
Analog I/O	Available via expansion modules