Static 1 signal at the F-DI for safe acknowledgement

What does F01666 mean?

A static '1' signal is present at the F-DI input designated for safe acknowledgment of safety functions. This indicates an incorrect input state, preventing proper acknowledgment or causing a fault, which can stop operations or prevent safety functions from being reset.

• The F-DI input configured for safe acknowledgment (e.g., F-DI1, F-DI2, or specific terminal) is stuck at a high (24VDC) signal level.
• External wiring fault (e.g., short to 24VDC) on the F-DI acknowledgment input terminal.
• Defective external acknowledgment device (e.g., button, switch) providing a continuous high signal.
• Incorrect parameterization of the F-DI input, setting it as an acknowledgment input when it should be a different safety function.
• Internal defect in the Control Unit's F-DI input circuitry.

Click steps to track your progress.

1. 1

   Identify the specific F-DI input configured for safe acknowledgment (refer to relevant P-parameters, e.g., P60001, P60002).

2. 2

   Measure the voltage at the identified F-DI input terminal (e.g., X124/1) with a multimeter to confirm a static 24VDC signal.

3. 3

   Temporarily disconnect the external device connected to the acknowledgment F-DI input to determine if the signal goes low (0VDC).

4. 4

   Inspect the wiring for the acknowledgment F-DI input for any short circuits to 24VDC or damaged insulation.

5. 5

   Verify the parameterization of the F-DI input (e.g., P60001, P60002) to ensure it is correctly assigned as a safe acknowledgment input and not misused.