Mitsubishi Electric MELSEC-Q Series User Manual page 227

(3) Functions
(a) Operation chart of the G(P).RDMSG instruction
Master station
CPU module
Command
G(P).RDMSG
1.
Device memory
5.
1.
The send data (S2) in the size specified in (S1)+2 are stored into the master module.
2.
The send data are sent to the station specified in (S1)+1.
3.
Processing for the send data is executed at the station specified in (S1)+1.
4.
A processing result is received from the station specified in (S1)+1.
5.
The received data are stored in the area from the device specified in (D1), and the device specified
in (D2) is set to ON.
(b) Simultaneous execution of the G(P).RDMSG instruction
The G(P).RDMSG instruction can be simultaneously executed to multiple remote device stations (up to four
stations). To the same remote device station, however, simultaneous execution of multiple instructions
including other dedicated instruction(s) is not allowed. Create a program so that the next dedicated instruction
is executed after Completion device (D2) turns on.
Master station
2.
Send data
4.
Received data
CHAPTER 9 DEDICATED INSTRUCTIONS
Target station
Request
Response
Remote device station
3.
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