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Firmware description
3ADW000379R0501 DCS550 Manual e e
Stop the drive
The drive can be stopped in two ways, either by taking away the On command directly which opens all
contactors as fast as possible after stopping the drive according to Off1Mode (21.02) or by means of the
following sequence:
Overriding Control
MainCtrlWord (7.01)
Drive
MainStatWord (8.01)
The overriding control removes Run
= 0; (bit 3)
In speed control mode, the drive stops according to
StopMode
(21.03). In torque control mode, the torque
reference is reduced to zero. When zero speed or zero
torque is reached the state RdyRef is removed.
RdyRef = 0; (bit 2)
The overriding control can keep the On
command if the drive has to be started up
again
The overriding control removes On
= 0; (bit 0)
All contactors are opened - the fan contactors stay in
according to
FanDly (21.14) - and the state RdyRun is
RdyRun = 0; (bit 1)
Besides, in MainStatWord (8.01), the drive’s state is shown in DriveStat (8.08). Off2 (Coast Stop) and Off3 (E-
stop) see chapter Start, Stop and E-stop control
.
Excitation
General
The DCS550 is equipped with an integrated field exciter its function is explained here.
Field control
The integrated field exciter is controlled by means of FldCtrlMode (44.01):
constant field (no field weakening), EMF controller blocked, default
field weakening active, EMF controller released
Field current monitoring
Field minimum trip
During normal operation, the field current is compared with M1FldMinTrip (30.12). The drive trips with F541
M1FexLowCur [FaultWord3 (9.03) bit 8] if the field current drops below this limit and is still undershot when
FldMinTripDly (45.18) is elapsed.
Note:
M1FldMinTrip (30.12) is not valid during field heating. In this case, the trip level is automatically set to 50 % of
M1FldHeatRef (44.04). The drive trips with F541 M1FexLowCur [FaultWord3 (9.03) bit 8] if 50 % of
M1FldHeatRef (44.04) is still undershot when FldMinTripDly (45.18) is elapsed.
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