Mitsubishi MELSEC LJ71C24, User Manual

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10 DATA COMMUNICATION USING THE NONPROCEDURAL PROTOCOL
10.1.3 Sequence program for data reception
This section explains the sequence program for data reception.
For details on the INPUT instruction for data reception, refer to Chapter 12.
1 When the completion device is off, execute the INPUT instruction. If the INPUT
instruction is executed when the completion device is on, data may not be
received properly.
1) Start the self-station programmable controller CPU.
The values specified with GX Works2 are stored in the C24.
2) When the amount of data specified by the received data count or data containing
the receive complete code is received from the external device, the reception data
read request (X3) turns ON.
3) After the control data for the INPUT instruction is stored in the device, the
sequence program executes the INPUT instruction and reads the receive data.
Before executing the INPUT instruction, check that the INPUT instruction complete
device (M0) is off.