7.1.2 Voltage stop ramp
When the softstarter is given a stop signal, the softstarter
decreases the output voltage to the motor in a quick stop
ramp, from full voltage down to set Step down voltage
level. For best performance the step down level shall be
set to 80%.
When step down level is reached the softstarter controls
the output voltage during pre set Stop ramp time to End
voltage level and cuts the output voltage to the motor,
see Figure 79.
Voltage stop ramp is configured with the following
parameters:
Parameter Description Setting range Default value
02.02 Stop mode Set to voltage ramp. No ramp,Voltage
ramp, Torque
ramp, DC Brake,
Soft brake
No ramp
02.05 Stop ramp end level Sets the level from where the stop ramp ends and the
power to the motor is cut (voltage level for Voltage stop
and torque level for Torque stop).
10 ... 99% 30%
02.06 Stop ramp time Sets the effective time it takes for the voltage to reach end
level.
0 ... 120 s 10 s
28.05 Step down level Sets the level from where the stop ramp initiates. 10 ... 100 % 80%
Figure 79: Voltage stop ramp
79
1SFC132081M0201
30%
80%
U
100%
Time
End voltage
Step down voltage
Stop ramp time
7
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