ABB PSTX30 Installation And Commissioning Manual page 113

7.18.6 Start without start command
This feature could be used for a customer that would like
to use the softstarter in the same way as a contactor is
used, i.e. as soon as the control supply to the softstarter
is turned on the softstarter will automatically start the
motor. No wiring of start and stop signals is needed.
Start without start command is configured with the
following parameters:
Parameter
28.04 Start without start command
7.18.7 Step down level
When the softstarter is given a stop signal the softstarter
first decreases the output voltage to the motor in a quick
stop ramp, from full voltage down to set Step down
voltage level. Then the softstarter controls the output
voltage in a stop ramp.
It is only meaningful to adjust the step down level for
torque control. When using voltage ramp it shall be set to
80%. Depending on the load it can be necessary to adjust
the step down level.
Step down level is configured with the following
parameters:
Parameter
28.05 Step down level
7.18.8 System mode
Select between:
• Normal mode
• Demo mode
• Small motor mode
Normal mode
Normal mode is the default setting and is used in all
situations except the ones described below.
Demo mode
Demo is used mainly for training purposes to simulate a
load condition without having the softstarter connected to
main power.
Small motor mode
small motor mode is used for basic testing purposes
when using a smaller motor than the PSTX is specified for.
The softstarter will be able to start the motor, but some
functions and protections are disabled.
System mode is configured with the following
parameters:
Parameter
28.40 System mode
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Description
Starts the motor without needing
an external start command.
Description
Set the level from where the stop
ramp initiates.
Description
Sets the run mode.
Setting range Default value
Off, On Off
Setting range Default value
10% ... 100% 80%
Setting range Default value
Normal, Demo, small Normal
motor
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