External Fault (Terminal S1)

What does EF1 mean?

This fault indicates that an external device triggered a fault via the Multi-Function Digital Input (MFDI) terminal S1, or there is incorrect wiring to S1, or the terminal is incorrectly configured for an external fault despite not being in use. This causes the drive to halt operation based on an external signal, potentially stopping connected machinery.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Ensure the MFDI settings for terminal S1 (parameter H1-01) are correctly configured for its intended use, or adjust if the terminal is not in use.