Frequently asked questions
How does the Ramp Divider (DCF) affect the deceleration time when the Fast Stop function is used on the ATV61 and ATV71 drives?
FA283088
28 July 2022
Issue:How does ATV61 and ATV71 Ramp Divider (DCF) affect the deceleration time when Fast Stop function is used?
Product Line:
Altivar 61 and 71
Environment:
All models
Cause:
How to figure the resulting ramp time.
Resolution:
When using the Fast stop assignment to a logic input (FST = LIx) or as the Type of Stop (STT = FST), the Ramp divider (DCF) affects the normal DEC setting:
Fast stop ramp time = DEC / DCF
If DEC = 20sec and DCF = 2, then the fast stop ramp is 20 / 2 = 10sec
If DEC = 20sec and DCF = 4, then the fast stop ramp is 20 / 4 = 5sec
Note that DCF = 0 produces an abrupt stop.