Cause: Setpoint timeout comes when the reception of setpoints from PROFINET has been interrupted or bus connection interrupted or controller switched off or controller set into the STOP state.

f8501 fault code in siemens drive indicates Setpoint timeout. This means loss of cyclic communication with the higher-level controller (usually a PLC) over a communication bus like PROFINET.

Troubleshooting Steps:

Follow these steps to correct f8501 fault code in siemens drive:

• Verify that the PLC is in RUN mode and is not experiencing any errors.
• Check the cable for any signs of damage.
• Try replacing the PROFINET cable with a known good one.
• If using network switches, ensure they are functioning correctly and are properly configured for PROFINET communication.