Mitsubishi Electric MELSEC-Q Series - Page 464

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(c) Checking the execution status of the RTMRD instruction
The execution status of the RTMRD instruction (Normal completion, Error completion) can be checked with the
following devices specified in the setting data.
• Completion device (D2)
Turns ON in the END processing for the scan after completion of the RTMRD instruction, and goes OFF in
the next END processing.
• Completion status indication device ((D2)+1)
Turns ON in the END processing for the scan after completion of the RTMRD instruction, and turns OFF in
the next END processing, only when the RTMRD instruction has failed.
(d) Operation in RTMRD instruction execution
• Operation of the own station
Program of
own station
Completion device
of own station (D2)
Completion status
indication device
((D2)+1)
RTMRD instruction
RTMRD instruction execution RTMRD 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