Unidrive SP has a dedicated hardware enable input which always controls Pr 6.29. If the enable is inactive the IGBT firing signals are turned off
without software intervention. As default (Pr 8.10 = 0) the drive is in the inhibit mode when the enable is inactive. Setting this parameter to one causes
the enable to behave as an Et trip input. When the input becomes inactive an Et trip is initiated. This does not affect Pr 10.32 (Et trip parameter),
therefore an Et trip can be initiated in this mode either by making the enable inactive or setting Pr 10.32 to one.