Mitsubishi Electric MELSEC iQ-R Series User Manual page 256

• Secure sufficient device areas according to the maximum length of data sent from the send source to
prevent the device areas used for other purposes from being overwritten by the receive data.
• When the data receive is consecutively executed, turn on pbi_bReadTiming (read timing) as shown in the
above program.
• To receive data at shorter intervals than the scan time of the CPU module, add the normally closed contact
of 'Receive normal completion' (M11) and 'Receive error completion' (M12) to the execution conditions of
FB for receiving as shown in the above program. When there is no normally closed contact of 'Receive
normal completion' (M11) and 'Receive error completion' (M12), 'Receive instruction (for starting FB)' (M17)
is not turned off and on and the FB for receiving may not be executed.
11 PROGRAMMING
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11.4 Example of Socket Communications