Frequently asked questions
What causes FST on the display of the Altivar drives?
28 September 2021Issue:
FST on the display of the Altivar drives.
Altivar 61, Altivar 71, Altivar 312, Altivar 12, Altivar 31, Altivar 58, Altivar 66
All serial number
What causes the drive status to show FST?
FST is fast stop. This is a status, not a fault. This status happens if a logic input is assigned to FST and the logic input is active. The second option is when the VFD is in a decelerating state and the type of stop is assigned to fast stop (FST).