Option Communication Error

What does bUS mean?

The connection was lost after establishing initial communication with an option card, or no signal was received from the PLC. This fault is only detected when the run command frequency reference is assigned to an option card.

• The connection was lost after establishing initial communication.
• No signal was received from the PLC.
• Faulty communications wiring or an existing short circuit.

Click steps to track your progress.

1. 1

   Verify all communication cables are securely connected and free from damage or short circuits.

2. 2

   Correct any faulty wiring or disconnected cables in the communication network.