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MELSEC-QnA
15 FUNCTIONS (FUNCTION VERSION B OR LATER)
15.7 Communication Instructions (Software Version J and Later)
Data communication with other stations can be performed using communication
instructions.
Device read/write with other stations can also be performed. Table 15.7 lists
communication instructions.
Refer to the QnACPU Programming Manual (Common Instructions) for the details of
each instruction.
instructions.
Device read/write with other stations can also be performed. Table 15.7 lists
communication instructions.
Refer to the QnACPU Programming Manual (Common Instructions) for the details of
each instruction.
Table 15.7 Communication Instruction List
Instruction Description
SEND
Transmits data (message) to the specified destination station (QnACPU).
RECV
Reads the data (message) sent by a SEND instruction.
READ
SREAD
Reads word device data of the QnACPU in the specified station to the local station
WRITE
SWRITE
Writes local data to a word device of the QnACPU in the specified station.
REQ
Transmits a transient request (remote RUN/STOP, etc.) to other stations and makes it executed.
Important
Do not issue the transmission and receiving instruction to the CPU other than QnACPU.