Mitsubishi MELSEC Q Series User Manual page 427

APPENDIX
Sequence program
OFF
RIRCV instruction
OFF
Completion device
OFF
Status display
device at completion
OFF
RYn
OFF
RXn
App - 16
(c) There are two types of interlock signals for the RIRCV instruction: the
completion device (D2) and the status display device at completion (D2)+1.
1) Completion device
Turns ON in the END processing of the scan where the RIRCV
instruction is completed, and turns OFF in the next END processing.
2) Status display device at completion
Turns ON and OFF depending on the completion status of the RIRCV
instruction.
Normal completion: Stays OFF and does not change.
Abnormal completion: Turns ON in the END processing of the scan
where the RIRCV instruction is completed, and turns OFF in the next
END processing.
END processing END processing
ON
Other end station send ready
(d) Multiple dedicated instructions cannot be executed for the same station.
Since it takes several scans until the processing of the dedicated instruction
is completed, execute the next dedicated instruction after the completion
device has turned ON.
The next dedicated instruction executed before completion of the previously
executed dedicated instruction is ignored.
(e) The basic number of steps of the RIRCV instruction is 10 steps.
(f) The receive buffer assignment is performed using the "Station information
setting" of the network parameters of the GX Developer. For more details,
see Section 6.2.
END processing END processing
Receive completion
MELSEC-Q
ON
On Abnormal
completion
Normal
completion
1 scan
App - 16