The ATV71 has LI2 assigned for run reverse. Why does the drive continue to run forward when LI2 goes high?


28 September 2021

ATV71 has run reverse command assigned to LI2 but the drive continues to run forward when LI2 is activated, 2 wire control.

Product Line:
Altivar 61, Altivar 71.

All models, All serial numbers.

Drive is not responding to the command to run reverse.

In 2 wire control, logic input LI1 is assigned to run forward. LI1 must be removed when switching to run reverse.  If the drive receives a run reverse command without removing the run forward command, it will continue to run forward.  The same logic holds true when switching from reverse to forward.