8.10 Instructions - Mitsubishi Electric FR-A8NCE Instruction Manual

8.10 Instructions

 Programming instructions
• 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.
• 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
 Operating and handling instructions
• Command only from the programmable controller can be accepted during CC-Link IE Field Network communication.
The run command from external and parameter unit is ignored.
• If different inverters have the same station number, the communication cannot be performed properly.
• The inverter protective function (E.OP1) is activated 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 Ethernet cable etc. during
CC-Link IE Field Network operation.
• If the programmable controller (master station) is reset during CC-Link IE Field Network operation or if the programmable
controller is powered OFF, data communication stops and the inverter protective function (E.OP1) is activated.
To reset the programmable controller (master station), switch the operation mode to the External operation once, then reset
the programmable controller.
• When Pr.340 = "0 (initial value)", any inverter whose main power is restored is reset to return to the External operation
mode. To resume the Network operation, therefore, set the operation mode to the Network operation using the
programmable controller program.
Set a value other than "0" in Pr.340 to start in the Network operation mode after inverter reset.
TO instruction
Incorrect
Write completion
PROGRAMMING EXAMPLES
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