BUS-OFF state of system bus (CAN)

What does CE4 mean?

The controller has received too many faulty telegrams via the system bus (CAN) and has disconnected from the bus. This indicates a severe communication issue on the CAN network, preventing data exchange.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Check PE (Protective Earth) connection.

2. 4

   Check bus load and reduce the baud rate if necessary, observing the recommended cable length.

3. 5

   Switch off the monitoring by setting parameter C0595 = 3.