Modbus Instruction manual 05/0874
74
Modbus Instruction manual 05/08
10.2.1 Behavior in quick stop
In this, the parameters Switch-off threshold
637 (percent of fmax) and Holding
time
638 (holding time after falling short of the switch-off threshold) are relevant. In
a quick stop, the drive is shutdown via the emergency stop ramps (
Emergency stop
clockwise
424 or Emergency stop anti-clockwise 425).
t
f
s
Start quick stop
Switch-off threshold.
637
Holding time
638
Emergency stop clockwise
424
425
Emergency stop anticlockwise
OFF,
status changed
If frequency/speed zero has been reached during the holding time, the drive contin-
ues to be supplied with direct current until the switch-off time has expired. With this
measure, there is an assurance that the drive is stationary in a change of state.
Note: The “behavior in quick stop” is only relevant for non motion control con-
figurations (
Configuration 30 ≠ x40).
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