I have 2Q armature drive and 4Q field drive, so field reversal is done via P50580 & 581.

I tried to implement the StandStill field to decrease motor heating during ON command presence but seems that doesnt work.

No problem with other drives with internal excitation, 

(P50082 = 2, P50257=70%, P50258=10sec, P50692=r46.3). StandStill works well.

But I cannot obtain the same function with the drives with external exciter.

I tried with P50082 = 22 but with the ON command drive immediately goes to F60105(1).

Any idea why this occurred? Changing threshold p50396 and time monitoring p50397 doesn’t help.

I already applied StandStill field in many other DCM drives, but all drives had or internal field or 4Q armature bridges. I never tried in case of field reversal.

Topic closed, because the question has been posted twice. The active topic can be found here:

6RA80 Stand Still field with external exciter

Kind regards, Moderator_Lan