External Fault (Terminal S1)

What does EF1 mean?

An external fault signal was received via MFDI terminal S1, possibly due to a problem with the connected external device, faulty wiring, or a misconfiguration where parameter H1-01 is set for an external fault (range 20 to 2F) but the terminal is not actively utilized. This will cause the drive to trip and stop the motor, potentially disrupting the process.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Verify and correct the signal line wiring connected to MFDI terminal S1, ensuring proper connections and no shorts.

2. 4

   If parameter H1-01 is configured for an external fault (range 20 to 2F), ensure the terminal is correctly used or reconfigure the parameter if it's unintentionally set.