Stopping The Drive With The Emergency-Off Function; Initiating An Emergency-Off - ABB ACS6080 User Manual

8.11.2

Stopping the drive with the emergency-off function

The drive is equipped with a hardwired emergency-off circuit. When an
emergency situation occurs during operation, this safety feature ensures
that the drive system can be disconnected without delay from the main
power supply. When the EMERGENCY-OFF push button has been pressed
while the drive is discharged, the main power supply cannot be connected
to the drive, hence the drive cannot be started up.
The EMERGENCY-OFF push button of the drive is part of the local control
panel (Figs. 8-3 and 8-4) and features a latching switch action.
IMPORTANT! Pressing the EMERGENCY-OFF push button does not
disconnect the auxiliary power supply from the drive.
Note: For more information, see "Emergency off/stop modes and
prevention of operation & safe torque off" (3BHS196243).
8.11.3

Initiating an emergency-off

An emergency-off is initiated by pressing the EMERGENCY-OFF push
button on the door of the drive control unit or an external EMERGENCY-
OFF push button (if present) linked to the emergency-off circuit.
When an emergency-off is initiated during operation, the following
sequence of events occurs:
1) MCB opens
2) Drive system coasts down
3) DC-link of the drive discharges
4) EMERGENCY-OFF RESET button flashes
5) SUPPLY OFF push button flashes
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