In case the communication between the PLC and the VFD has stopped for a certain time that configured in P14.04 (communication overtime fault time) there are 2 ways to handle this matter:

1.       Set P14.05 (Transmission fault processing) to any listed option:

0.       Alarm and stop freely

1.       No alarm and continue to run

2.       No alarm and stop according to the stop means( only under the communication control)

3.       No alarm and stop according to the stop means(under all control modes)