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(3) Functions
(a) Operation chart of the G(P).RDMSG instruction
Master station
Programmable controller CPU
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 station.
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) 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. Because several scans are required to complete the process of the
dedicated instruction, create a program so that the next dedicated instruction is executed after Completion
device (D2) turns on.
CHAPTER 9 DEDICATED INSTRUCTIONS AND PROGRAMMING
Master station
2
Send data
4
Received data
Target station
Remote device station
Request
Response
9
3
239
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