Mitsubishi Electronics FX3G

840

FX3G/FX3U/FX3UC Series Programmable Controllers

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 PLCs ]

D 8074*1 Lower [X000] Ring counter value for rising edge

(1/6 µs unit) 3*2 – –

M8076

M8080

–––– –

D 8075*1 Upper –– –––– –

D 8076*1 Lower [X000] Ring counter value for falling edge

(1/6 µs unit) 3*2 –– –––– –

D 8077*1 Upper –– –––– –

D 8078*1 Lower [X000] Pulse width/Pulse period

(10 µs unit) 3*2 –– –––– –

D 8079*1 Upper –– –––– –

D 8080*1 Lower [X001] Ring counter value for rising edge

(1/6 µs unit) 3*2 – –

M8077

M8081

–––– –

D 8081*1 Upper –– –––– –

D 8082*1 Lower [X001] Ring counter value for falling edge

(1/6 µs unit) 3*2 –– –––– –

D 8083*1 Upper –– –––– –

D 8084*1 Lower [X001] Pulse width/Pulse period

(10 µs unit) 3*2 –– –––– –

D 8085*1 Upper –– –––– –

D 8086*1 Lower [X003] Ring counter value for rising edge

(1/6 µs unit) 3*2 – –

M8078

M8082

–––– –

D 8087*1 Upper –– –––– –

D 8088*1 Lower [X003] Ring counter value for falling edge

(1/6 µs unit) 3*2 –– –––– –

D 8089*1 Upper –– –––– –

D 8090*1 Lower [X003] Pulse width/Pulse period

(10 µs unit) 3*2 –– –––– –

D 8091*1 Upper –– –––– –

D 8092*1 Lower [X004] Ring counter value for rising edge

(1/6 µs unit) 3*2 – –

M8079

M8083

–––– –

D 8093*1 Upper –– –––– –

D 8094*1 Lower [X004] Ring counter value for falling edge

(1/6 µs unit) 3*2 –– –––– –

D 8095*1 Upper –– –––– –

D 8096*1 Lower [X004] Pulse width/Pulse period

(10 µs unit) 3*2 –– –––– –

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

3UC

Correspond-

ing special

device

1NC

2NC