MEMOBUS Communication Error

What does CE mean?

This fault occurs when communication via MODBUS (MEMOBUS) is interrupted for longer than 2 seconds after initial communication has been established. This indicates a loss of data exchange with the control system or HMI, which can lead to uncontrolled operation, system downtime, or failure to receive critical commands.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Ensure proper termination resistors are installed at both ends of the communication bus if applicable.

2. 4

   Monitor the communication line for noise or interference using diagnostic tools.

3. 5

   If communication resumes sporadically, check the master device's polling rate and network stability.