7.02 Used current reference differs from 27.05 Motor current for longer than 5 sec by more than 20 % of nominal motor current. If the current controller cannot match the given current reference, the warning signal is created. Normally the reason is a too small incoming voltage compared to the motor EMF.

For non-motoric applications, it is possible to block the warning using 06.11.b07 Auxiliary control word 2.
Check:
− For blown DC fuses.
− The ratio between mains voltage and armature voltage (either the mains voltage is too low or the motor’s armature voltage is too high).
− If the setting of 30.44 Minimum firing angle is too high.