Mitsubishi Electric MELSEC-Q Series - Page 382

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(d) Operation in REQ instruction execution
• Operation of the own station
(e) REQ instruction execution timing
With J.REQ or G.REQ, processing is executed one after another while the start contact is ON.
With JP.REQ or GP.REQ, processing is performed one time only when the start contact turns ON from OFF.
• When completed normally
Program of own station
Completion device of
own station (D2)
Completion status indication
device ((D2)+1)
REQ instruction
REQ instruction execution
REQ instruction execution
completed
Start contact
OFF
OFF
OFF
ON
ON
ON
END processing END processing END processing END processing
When failed
Normal
completion
1 scan
1 scan
REQ
Sequence scan
Start contact
Own station CPU
Target station CPU
Remote RUN/STOP
CC-Link IE Controller
Network module
Network module
OFF
Completion device
(Device specified in (D2))
Completion status indication
device (Device of (D2)+1)
Sequence scan
END0 END0
Channel 1
END0 END0 END0
END0 END0 END0 END0 END0