Mitsubishi FX3G Series Programming Manual

836
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 -)
Pulse width/Pulse period measurement [FX3G, FX3GC PLCs ]
D 8074
*1
Lower
[X000] Ring counter value for rising edge
(1/6 µs unit)
3
*2
3
– –
M8076
M8080
–––– –
D 8075
*1
Upper
– – –––– –
D 8076
*1
Lower
[X000] Ring counter value for falling edge
(1/6 µs unit)
3
*2
3
– – –––– –
D 8077
*1
Upper
– – –––– –
D 8078
*1
Lower
[X000] Pulse width/Pulse period
(10 µs unit)
3
*2
3
– – –––– –
D 8079
*1
Upper
– – –––– –
D 8080
*1
Lower
[X001] Ring counter value for rising edge
(1/6 µs unit)
3
*2
3
– –
M8077
M8081
–––– –
D 8081
*1
Upper
– – –––– –
D 8082
*1
Lower
[X001] Ring counter value for falling edge
(1/6 µs unit)
3
*2
3
– – –––– –
D 8083
*1
Upper
– – –––– –
D 8084
*1
Lower
[X001] Pulse width/Pulse period
(10 µs unit)
3
*2
3
– – –––– –
D 8085
*1
Upper
– – –––– –
D 8086
*1
Lower
[X003] Ring counter value for rising edge
(1/6 µs unit)
3
*2
3
– –
M8078
M8082
–––– –
D 8087
*1
Upper
– – –––– –
D 8088
*1
Lower
[X003] Ring counter value for falling edge
(1/6 µs unit)
3
*2
3
– – –––– –
D 8089
*1
Upper
– – –––– –
D 8090
*1
Lower
[X003] Pulse width/Pulse period
(10 µs unit)
3
*2
3
– – –––– –
D 8091
*1
Upper
– – –––– –
D 8092
*1
Lower
[X004] Ring counter value for rising edge
(1/6 µs unit)
3
*2
3
– –
M8079
M8083
–––– –
D 8093
*1
Upper
– – –––– –
D 8094
*1
Lower
[X004] Ring counter value for falling edge
(1/6 µs unit)
3
*2
3
– – –––– –
D 8095
*1
Upper
– – –––– –
D 8096
*1
Lower
[X004] Pulse width/Pulse period
(10 µs unit)
3
*2
3
– – –––– –
D 8097
*1
Upper
– – –––– –
D 8098 Not used
– – – – – –––– –
*1. Cleared when PLC switches from STOP to RUN.
*2. Available in Ver. 1.10 or later.
High-Speed Ring Counter
D 8099
Up-operation high-speed ring counter of 0 to
32,767 (in units of 0.1ms, 16-bit)
*3
– – 3 3 M8099 – – 3 – 3
[D]8100 Not used
– – – – – –––– –
*3. For FX2N/FX2NC, 0.1ms high-speed ring counter D8099 will operate after END instruction is executed while
M8099 is ON.
For FX3U/FX3UC, 0.1ms high-speed ring counter D8099 will operate after M8099 turns ON.
Number and name Content of register
Applicable model
FX 3G FX 3GC FX 3U 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