Option PCB Communication Error Fault

What does F6-CEF mean?

This fault occurs when a serial communication option board, attached to the drive at the 2CN connector, detects a communication error. Unless parameter F6-01 is specifically set to '3: Alarm Only', this condition will energize the fault output and potentially stop the drive, indicating a critical problem with the communication link to the option board.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Check the communication parameters (e.g., baud rate, parity, address) configured on both the option board and the external master for consistency.

2. 4

   If F6-01 is not set to '3: Alarm Only', try setting it temporarily to 'Alarm Only' to observe if the communication issue persists as an alarm rather than a fault, which can aid in diagnosis.

3. 5

   Consult the specific option board manual for diagnostic indicators, LEDs, or communication status registers for more detailed error information.