Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 1703

Precautions
• The following table summarizes the processes that take place if another instruction is issued while the G(P).PRR instruction
is active or the G(P).PRR instruction is issued while another instruction is active with the same channel.
Instruction to execute
*1
concurrently
G(P).PRR
G.INPUT
G(P).OUTPUT
ZP.CSET
G(P).PUTE
G(P).GETE
Z.BUFRCVS
G(P).SPBUSY
ZP.UINI
*1 The following instructions are not available with the same channel as for the G(P).PRR instruction because they use a communication
protocol different from the one used by this instruction.
• G(P).ONDEMAND, G(P).CPRTCL, G(P).BIDOUT, and G(P).BIDIN instructions
• The local device and the file register for each program are not available for setting data.
Operation error
Error code Description
((s)+1)
 MELSEC iQ-R Serial Communication Module User's Manual (Application)
7000H to 7FFFH
Possibility of Handling for concurrent execution
concurrent execution

The instruction is ignored and does not start processing until the active instruction
completes.
Concurrent execution is, however, possible if they use different channels.
 

A dedicated instruction concurrent execution error (7FF0H) occurs in the second
instruction.
Concurrent execution is, however, possible if they use different channels.
 

A dedicated instruction concurrent execution error (7FF0H) occurs in the second
instruction.
20 SERIAL COMMUNICATION INSTRUCTIONS
20.9 Sending Data by Using User Frames
20
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