Function Loss

What does F094 mean?

The "Freeze-Fire" (Function Loss) input is inactive or open, typically configured on a digital input terminal. This input is designed to be active during normal operation, and its loss indicates a pre-programmed operational or safety condition that requires the drive to stop.

• The digital input terminal configured for "Freeze-Fire" (e.g., DI1, DI2, DI3) is open or disconnected when it should be active.
• External control circuitry providing the "Freeze-Fire" signal has failed (e.g., relay contact open, PLC output inactive).
• The digital input parameter (e.g., P5-01, P5-02) assigned to the "Freeze-Fire" function is incorrectly configured for normally open instead of normally closed (or vice-versa).
• A broken wire or loose connection in the control wiring from the "Freeze-Fire" source to the drive's digital input terminal.
• Internal failure of the drive's digital input circuit (e.g., opto-coupler).

Click steps to track your progress.

1. 1

   1. Measure the voltage across the configured "Freeze-Fire" digital input terminal (e.g., DIn) and the common terminal (e.g., DCOM) to confirm its state (e.g., 24VDC for active).

2. 2

   2. Inspect the physical wiring from the "Freeze-Fire" signal source to the drive's digital input terminal for continuity (e.g., resistance < 1 Ohm).

3. 3

   3. Temporarily bypass the external control device by shorting the configured "Freeze-Fire" digital input terminal to the common terminal (e.g., DCOM) and observe if the fault clears.

4. 4

   4. Verify parameter P5-xx (where xx is the input used) is correctly configured for the desired "Freeze-Fire" function and its polarity (e.g., normally open/closed).

5. 5

   5. Check the external control device (e.g., PLC output card) by measuring its output voltage to ensure it is providing the expected signal.