External Fault (Input Terminal S1)

What does EF1 mean?

An external fault has been triggered at multi-function input terminal S1. This signifies that an external device connected to S1 has activated an alarm function, or there's an issue with the wiring or configuration of terminal S1. This fault will typically cause the drive to stop operation.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Verify that the multi-function input parameter for S1 (e.g., H1-01) is correctly set for external fault detection and that no unused terminals are inadvertently configured.