3BHS842007 E01 REV C
ACS6080
USER MANUAL
181/238
08 OPERATION
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
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
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.