SI CU: Control Unit software incompatible

What does 230672 mean?

The existing Control Unit software does not support the safe drive-based motion monitoring function, leading to a STOP A that cannot be acknowledged. The fault value (r0949) is typically for internal Siemens troubleshooting. This indicates a fundamental incompatibility between the CU's software version and the attempted safety function.

• The installed Control Unit firmware version is older and does not include the necessary Safety Integrated (SI) functionalities for drive-based motion monitoring.
• Firmware update was incomplete or corrupted, resulting in a partially updated or incompatible software state on the Control Unit.
• Incorrect Control Unit type selected during hardware configuration (e.g., using a non-SI capable CU with a safety application).
• Parameterization error attempting to enable SI motion monitoring functions (e.g., SS1, SLS, SLP) on a Control Unit that fundamentally lacks support.

Click steps to track your progress.

1. 1

   1. Verify the exact part number and firmware version of the installed Control Unit, comparing it against the system requirements for safe drive-based motion monitoring.

2. 2

   2. Update the Control Unit firmware to a version that explicitly supports the required Safety Integrated motion monitoring functions (e.g., via TIA Portal or STARTER).

3. 3

   3. Perform a full factory reset (e.g., P0010=30, P0970=1) of the Control Unit after firmware update, then re-commission all parameters and safety settings.

4. 4

   4. Check the hardware configuration in the engineering software (e.g., TIA Portal) to ensure the correct Control Unit type (e.g., specific SINAMICS CU model with SI) is selected.

5. 5

   5. Review the Safety Integrated commissioning documentation for the specific Control Unit to confirm its capabilities and configuration requirements.