Parameter value is not valid in this mode

What does 91 mean?

An attempt was made to write an illegal or invalid value to a parameter, or the value is not permissible under the drive's current operating mode. This prevents incorrect settings from being applied that could lead to instability or unsafe operation.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Correct the value being written to be within the allowed limits or valid options as specified.

2. 4

   If the drive is running, certain parameters can only be changed when the motor is stopped; refer to the parameter attributes.