Siemens · SINAMICS G120
Communication has been lost with the Communication Board (CB) within the drive. This indicates a potential hardware fault with the CB or its connection, preventing proper data exchange and potentially disrupting external communication protocols, leading to a loss of control or monitoring capabilities.
Click steps to track your progress.
1. Power down the drive completely, then carefully reseat the communication board (CB) in its slot, ensuring all connectors are firmly engaged.
2. Visually inspect the internal ribbon cables and connectors between the CB and the main control board for signs of damage or incorrect connection.
3. Temporarily swap the communication board (CB) with a known-good spare (if available) to determine if the board itself is faulty.
4. Check diagnostic LEDs on the main control board and the CB (if present) for any specific error indications related to internal communication.
5. Perform a drive firmware update to the latest compatible version, as internal communication issues can sometimes be resolved by software improvements.