Mode designation error

What does Er4 mean?

This error occurs if parameter setting was attempted in External or NET operation mode while Pr.77 (Parameter write selection) is '1', or if parameter write was attempted when the command source is not the operation panel. It indicates a conflict between the current operating mode or command source and the attempt to write parameters.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   If writing from the PU, ensure Pr.551 (PU mode operation command source selection) is set to '4'.