ABB PSTX Series Installation And Commissioning Manual page 123

7.20 Special feature
This chapter gives a description of features that are
available to all users, but beyond the normal range of use
for the Softstarter.
The features are:
• Emergency mode
• Line contactor close time
• Limp mode
• Start without start command
• Step down level
• System mode
• TOR relay delay time
7.20.1 Emergency mode
The normal operation of the Softstarter when a fault is
detected is to do a direct stop. The programmable digital
input can be set to Emergency mode (active low) or
Emergency mode (active high), see chapter 7.14.2 Digital
Inputs When Emergency mode is active, a symbol in the
upper right corner of the HMI screen will be visible, see
chapter 6.1.5 Symbols in the screen
When the Softstarter is in Emergency mode, and a fault
or protection is detected, the Softstarter will try to run the
motor with the start and stop signals, ignore safety and
continue to run regardless of consequences. This can be
done as long as the PCBA is not broken.
The programmable output relays can be programmed to
Event group 0...6 but will not be activated to an event
during Emergency mode. This is important in the case the
output relays is used to control a line contactor or circuit
breaker All events will be stored in the event log.
• If the build-in bypass is not working the circuit to the
motor is closed by using the thyristors
• If the thyristors are not working the circuit to the motor
is closed by using the built-in bypass.
WARNING
Warranty for damage on the thyristors or
the built-in bypass are not valid during
Emergency mode.
1SFC132081M0201 | Installation and commissioning manual | Functions
7
123