What can cause the ATV71 drive to run on power up with Logic input switch turned off?


16 June 2022

ATV71 drive to running on power up with Logic input switch turned off

Product Line:
Altivar 71, Altivar 61

All models and serial numbers

Internal short

Drive state is RUN   Drive is in terminal control.  Logic input map shows LI1 is enabled.  0 volts is measured between COM and LI1.  This logic input appears to be shorted internally.  You will need to remove the Logic input terminal POD to trip the drive on a PRA condition.  Now you can go into Menu 1.5 IO and change RRS reverse to LI2.  Move the wiring from LI1 to LI2.  Swap two motor wires on the load side of the drive.   Check Logic input map.