Field Reversal Wait Times / Field Rev T_Wait; Sequence Control Line Contactor On Delay / Line Cont T_On - Siemens SINAMICS DCM List Manual

2 Parameters
2.2 List of parameters
p50092[0...3]

Field reversal wait times / Field rev t_wait

DC_CTRL Can be changed: U, T
Data type: FloatingPoint32
P-Group: -
Not for motor type: -
Min
0.0 [s]
Description: Sets the times to control the reversing contactor to reverse the field for a 2-quadrant device with field reversal.
Index: [0] = Field decay
[1] = Control new field contactor
[2] = Enable field firing pulses
[3] = After field build up before armature enable
Dependency: Refer to: p50580, p50581, p50583, r53195
Note: Re index 0:
Wait time for the field to decay before opening the actual field contactor.
When initiating an operation to reverse the field, after reaching I_Field (r52265) < I_Field_min (p50394), this wait time
expires before the actual field contactor is opened.
Re index 1:
Wait time before controlling the new field contactor.
After the actual field contactor has opened, this wait time expires before the field contactor is controlled for the "new"
field direction (the dropout delay time of the contactor used is generally higher than the closing delay time).
Re index 2:
Wait time before enabling the field firing pulses.
After controlling the field contactor for the "new" field direction, this wait time expires before the field firing pulses are
enabled. This time must be greater than the closing delay time of the contactor being used.
Re index 3:
Wait time after the field has been re-established before the armature is enabled.
After the field firing pulses have been enabled, the field current actual value I_field in the "new" field direction reaches
the value I_field (r52265) > I_field_set (r52268) * p50398/100%. This wait time then starts to run. After this expires,
the internal (armature) "operating enable for field reversal" is issued, and the drive is no longer held in operating state
o1.4.
After the field current has been re-established, this wait time allows the system to wait for the overshoot of the field
current actual value to end and therefore the overshoot of the EMF of the DC motor before armature operation is
enabled. This is intended to avoid armature overcurrents due to an excessively high EMF during an overshoot.
p50093

Sequence control line contactor ON delay / Line cont t_ON

DC_CTRL Can be changed: U, T
Data type: FloatingPoint32
P-Group: -
Not for motor type: -
Min
0.0 [s]
Description: Sets the ON delay for the line contactor.
The switching on of the line contactor in relation to that of the auxiliaries is delayed by the time set here.
396
Calculated: -
Dyn. index: -
Unit group: -
Scaling: -
Max
10.0 [s]
Calculated: -
Dyn. index: -
Unit group: -
Scaling: -
Max
120.0 [s]
List Manual (LH8), 02/2015, 6RX1800-0ED76
Access level: 2
Func. diagram: 6920
Unit selection: -
Expert list: 1
Factory setting
[0] 3.0 [s]
[1] 0.2 [s]
[2] 0.1 [s]
[3] 3.0 [s]
Access level: 2
Func. diagram: 2651
Unit selection: -
Expert list: 1
Factory setting
0.0 [s]
SINAMICS DCM