A128 alarm in WEG CFW701 Drive indicates a Serial Communication Timeout. This means the serial network link dropped out before new control data was received from the master.
Cause:
- Check the wiring and the ground installation.
- The inverter has not received any new message within the time interval set in parameter P0314.
Note: It can be disabled by setting parameter P0314 = 0.0 s.
Remedy:
Check serial connections, shield grounding, and wiring. Adjust master polling times, or disable timeout by modifying P0314.
