ABB PST105, Installation And Commissioning Manual

Page: 136 / 200

Functions
Chapter 10
136
1SFC132003M0201
10:8 End voltage
Path in menu:
Menu/SETTINGS/Functional Settings/
Start/Stop / End Volt
This parameter makes it possible to set the voltage level
where the stop ramp ends. The voltage or the torque will
decrease from full voltage to this level and then cut the power
to the motor. This function will be active only if parameter
Stop ramp is used.
10:9 Step down voltage
Path in menu:
Menu/SETTINGS/Functional Settings/
Start/Stop / Step Down
When stopping a motor using the stop ramp, the speed will
not decrease immediately. The step down voltage function
makes it possible to set a level where the motor speed
decreases as soon as the stop ramp begins. By this, a more
optimized stopping of the motor is achieved. This function is
not available when the stop mode is set to “torque”
.
30%
70%
U
100%
1SFC132098F0001
Figure 8: End voltage for Stop ramp
Stop
Parameter
text Default value Setting range Description
End Volt 30% 30...70% End voltage for
stop ramp
Parameter
text Default value Setting range Description
Step Down 100% 30...100% Voltage value to
which the soft-
starter shall step
down at stop and
where it shall
commence the
stop ramp.
30%
U
100%
1SFC132099F0001
Figure 9: Step down voltage for Stop ramp
Example 50%
Stop Time
End voltage 30%