Field Converter Alpha G Limit / Field Alpha G Lim; Field Converter Alpha W Limit / Field Alpha W Lim; Field Average Number Of Line Periods / Field Line Per No.; Field Pre-Control Activation / Field Prec Act - Siemens SINAMICS DCM List Manual

2 Parameters
2.2 List of parameters
p50250[0...n]

Field converter Alpha G limit / Field Alpha G lim

DC_CTRL Can be changed: U, T
Data type: FloatingPoint32
P-Group: -
Not for motor type: -
Min
0 [°]
Description: Sets the rectifier stability limit for the firing angle of the field converter.
Dependency: Refer to: r53191
Note: The status of the Alpha G limit is shown in r53191.1.
p50251[0...n]

Field converter Alpha W limit / Field Alpha W lim

DC_CTRL Can be changed: U, T
Data type: FloatingPoint32
P-Group: -
Not for motor type: -
Min
0 [°]
Description: Sets the inverter stability limit for the firing angle of the field converter.
Dependency: Refer to: r53191
Note: The status of the Alpha W limit is shown in r53191.0.
p50252[0...n]

Field average number of line periods / Field line per no.

DC_CTRL Can be changed: T
Data type: Unsigned16
P-Group: -
Not for motor type: -
Min
1
Description: Setting of the number of line periods for line frequency correction in the field circuit.
Note: The internal line synchronization for the field firing pulses derived from the power terminals (line infeed) is averaged
over the number of line periods set in this parameter.
In the case of operation on "weak" power supplies with unstable frequencies (on a diesel-driven generator, for
example (isolated operation), this parameter must be set lower than for operation on "constant V/Hz" systems to
achieve a higher frequency correction speed.
p50253[0...n]

Field pre-control activation / Field prec act

DC_CTRL Can be changed: T
Data type: Integer16
P-Group: -
Not for motor type: -
Min
0
Description: Sets activation/de-activation for field pre-control.
Value: 0:
1:
Note: If value = 0:
The field pre-control output is -100% (corresponds to 180 °).
428
Deactivated
Activated
Calculated: -
Dyn. index: DDS, p0180
Unit group: -
Scaling: -
Max
180 [°]
Calculated: -
Dyn. index: DDS, p0180
Unit group: -
Scaling: -
Max
180 [°]
Calculated: -
Dyn. index: DDS, p0180
Unit group: -
Scaling: -
Max
20
Calculated: -
Dyn. index: DDS, p0180
Unit group: -
Scaling: -
Max
1
List Manual (LH8), 02/2015, 6RX1800-0ED76
Access level: 3
Func. diagram: 6915
Unit selection: -
Expert list: 1
Factory setting
0 [°]
Access level: 3
Func. diagram: 6915
Unit selection: -
Expert list: 1
Factory setting
180 [°]
Access level: 3
Func. diagram: 6952
Unit selection: -
Expert list: 1
Factory setting
20
Access level: 2
Func. diagram: 6910
Unit selection: -
Expert list: 1
Factory setting
1
SINAMICS DCM