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PROGRAMMING EXAMPLES
4) If the PLC (master station) is reset during CC-Link operation or if the PLC is powered off, data
communication stops and the inverter is brought to an alarm stop "E.OP1" or "E.OP3".
To reset the PLC (master station), switch the operation mode to the external operation once, then
reset the PLC.
5) 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 PLC program.
Set a value other than "0" in Pr. 340 to start in the network operation mode after inverter reset. (Refer
to page 21)
(3) Troubleshooting
1)Operation mode does not switch to the network operation mode
• Check that the option unit (FR-A7AC) and CC-Link dedicated cables are fitted properly.
(Check for contact fault, break in the cable, etc.)
• Check that Pr. 542 CC-Link station number setting switches are set to the correct positions. (Check
that the station number matches the program, the station numbers are not repeated, and the
station number is not outside the range.)
• Check that the inverter is in the external operation mode.
• Check that the operation mode switching program is running.
• Check that the operation mode switching program has been written correctly.
2)Inverter does not start in the network operation mode
• Check that the inverter starting program has been written correctly.
• Check that the inverter starting program is running.
• Check that Pr.338 Communication operation command source is not set to external.
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