Event E014
Qualified person
Event message:
Battery Stack-UCC CAN Communication Disconnection
Explanation:
The system has not received any valid CAN messages from the Unit Control Controller (UCC) within the specified time period and interprets this as an interruption of the communication connection. This error causes the system to be unable to receive superordinate control commands and to enter an error state.
Corrective measures:
Check the CAN communication cables between the battery stack and the UCC for secure connections (cables A and B). Make sure that the interface connections are not loose, disconnected, or damaged.
Access the backend of both the BMS and UCC devices to ensure that their CAN communication parameters (e.g., baud rate, port number, CAN ID) are configured consistently and correctly.
Ensure that the electricity supply to the UCC controller is normal and that its operating state is stable.
Optional: If no UCC device is configured on site, disable the "UCC communication detection" function in the BMS system settings (set to "Do not detect") to avoid false alarms.
Once the cabling has been repaired or the parameters adjusted, communication is automatically resumed and the error alarm is cleared. If detection is disabled, the alarm will disappear automatically after the settings have been saved.