Mitsubishi Electric MELSEC iQ-R Series User Manual page 43

■Processing at service request reception
The following example is a program for serial poll, which is performed at service request reception.
For the program of turning on 'Interface message transmission request' (Y2), refer to the following.
Page 42 Program common to interface message transmission
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(0) At service request reception, the following operations are performed by turning on 'SerialPollCommand' (M4): all devices are specified as the interface
message destination; the serial poll is performed.
7 COMMUNICATION EXAMPLES
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7.2 Program Examples