Sign-of-life error in the Safety data

What does F01625 mean?

An error has occurred with the safety data's sign-of-life signal, indicating a potential communication or integrity issue within the safety functions. This can be caused by EMC disturbances or an inadmissible voltage at a Control Unit digital output. Such an error critically impacts the system's ability to maintain safe operation.

• Electromagnetic compatibility (EMC) interference affecting the safety communication bus or internal Control Unit communication.
• Incorrect or inadequate shielding of safety communication cables (e.g., PROFIsafe line).
• Processor overload or internal timing issues within the Control Unit preventing timely processing of safety sign-of-life signals.
• Temporary communication disruption between the safety Control Unit and the safety application (e.g., Safety CPU).
• Inconsistent safety configuration data (e.g., checksum mismatch) between the drive and the higher-level safety controller.

Click steps to track your progress.

1. 1

   Inspect and verify the shielding termination for all safety communication cables (e.g., PROFINET/PROFIBUS) at both the drive and controller ends.

2. 2

   Check for potential sources of high-frequency interference (e.g., unsuppressed contactors, welding equipment) near the drive or safety communication lines.

3. 3

   Verify the drive's firmware version is compatible with the safety PLC firmware and the configured safety functions.

4. 4

   Perform a power cycle of the drive and the associated safety controller to re-initialize communication.

5. 5

   Review event logs (e.g., drive fault memory and safety PLC diagnostic buffer) for concurrent communication issues or other related faults.