Test stop for fail-safe digital output error

What does F30773 mean?

An error occurred during the forced checking procedure (test stop) for the fail-safe digital output, indicating a potential wiring issue or malfunction of the output itself. This means the safety test failed, and the fail-safe output cannot be trusted.

• Wiring fault (e.g., open circuit, short to ground, short to 24VDC) on the fail-safe digital output circuit during the test pulse.
• External load (e.g., safety contactor coil, indicator lamp) connected to the F-DO is faulty or draws incorrect current, failing the test pulse check.
• Internal defect in the fail-safe digital output module (e.g., switching element failure) detected during self-test.
• Incorrect parameterization of the F-DO test (e.g., P30703 for test pulse type or duration) leading to an invalid test.
• Excessive noise on the F-DO line causing the test pulse monitoring to fail or misinterpret the signal.

Click steps to track your progress.

1. 1

   Identify the specific fail-safe digital output channel (e.g., F-DO0) that failed the test, as indicated by r2124.

2. 2

   Measure the voltage and current at the F-DO terminals (e.g., X1:F-DO0 and X1:F-DO_RET) during a manual test pulse activation if available.

3. 3

   Perform a continuity check on the wiring from the inverter F-DO terminal to the external load (e.g., safety contactor coil, resistor R1).

4. 4

   Temporarily disconnect the external load from the F-DO and repeat the test to determine if the load (e.g., contactor K1) itself is faulty.

5. 5

   Verify the F-DO parameterization (P30702, P30703) including output type (e.g., 2-channel with test pulses) and pulse duration settings.

6. 6

   Observe diagnostic LEDs on the F-DO module for specific indications of the test error (e.g., Red LED on F-DO channel).