8.10 Instructions - Mitsubishi Electric FR-A7NC E kit-SC Instruction Manual

8.10 Instructions

(1) Programming instructions
1) Since the buffer memory data of the master station is kept transferred (refreshed) to/from the
inverters, the TO instruction need not be executed every scan in response to data write or read
requests.
The execution of the TO instruction every scan does not pose any problem.
2) If the FROM/TO instruction is executed frequently, data may not be written reliably.
When transferring data between the inverter and sequence program via the buffer memory, perform
the handshake to confirm that data has been written without error.
TO instruction
Correct
Write completion
(2) Operating and handling instructions
1) Command only from the programmable controller can be accepted during operation from CC-Link
communication.
The run command from external and parameter unit is ignored.
2) If the station number set to different inverters is not the same, normal communication cannot be
made.
3) The inverter is brought to a fault "E.OP1" if data communication stops for more than the time set in
Pr. 500 Communication error execution waiting time due to a programmable controller fault, an open
CC-Link dedicated cable etc. during CC-Link operation.
PROGRAMMING EXAMPLES
TO instruction
Incorrect
Write completion
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