ABB PSTX30 Installation And Commissioning Manual page 70

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
02.02 Stop mode
7
02.05 Stop ramp end level
02.06 Stop ramp time
28.05 Step down level
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Description
Set to voltage ramp.
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).
Sets the effective time it takes for the voltage to reach end
level.
Sets the level from where the stop ramp initiates.
79
U
100%
80%
30%
Stop ramp time
Figure 79: Voltage stop ramp
Setting range
No ramp,Voltage
ramp, Torque
ramp, DC Brake,
Soft brake
10 ... 99%
0 ... 120 s
10 ... 100 %
Step down voltage
End voltage
Time
Default value
No ramp
30%
10 s
80%