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.
