Device Rated Direct Current Reduction / Device I_Rated Red; Power Unit I2T Monitoring Derating Factor / Pu I2T Mon Derat; Supply Voltage Rated Value / V_Supp Rated Val - Siemens SINAMICS DCM List Manual

2 Parameters
2.2 List of parameters
p50076[0...1]

Device rated direct current reduction / Device I_rated red

DC_CTRL Can be changed: C2(1), T
Data type: FloatingPoint32
P-Group: -
Not for motor type: -
Min
1.0 [%]
Description: Sets the reduction of the device rated direct current for armature and field.
The device rated direct current is reduced to the value set here to better adapt the device to the motor.
Index: [0] = Armature
[1] = Field
Note: - If a load class has been set in parameter p50067 which reduces the device rated direct current, the smaller of the
two values will be applied.
- The value set in index 0 (armature) results in a hardware-based adaption of the current actual value sensing gain.
This can only be adapted in a discrete stages. As a consequence, the value set here is not precisely effective, but the
next possible value. The actually effective rated device current can be seen in parameter r50072[1].
The following applies:
r50072[1] = K * r50072[0]
K = A/255
A = p50076[0] * 255/100 (rounded to the next lower integer number)
p50077

Power unit I2t monitoring derating factor / PU I2t mon derat

DC_CTRL Can be changed: T
Data type: FloatingPoint32
P-Group: -
Not for motor type: -
Min
0.50
Description: Sets the derating factor for I2t monitoring of the power unit.
Note: Derating is required in the following cases:
- Operation at increased ambient temperature
- Installation altitude more than 1000 m above sea level
The derating factor should be taken from the following reference:
SINAMICS DCM Operating Instructions - Chapter "Derating" and "Sensor for ambient or air intake temperature"
p50078[0...1]

Supply voltage rated value / V_supp rated val

DC_CTRL Can be changed: C2(1), T
Data type: FloatingPoint32
P-Group: -
Not for motor type: -
Min
10 [Vrms]
Description: Sets the rated value of the supply voltage for armature and field.
This parameter should be used to set the rated voltage value of the actual line used to supply power to the power
unit.
Index: [0] = Armature
[1] = Field
Note: This value is the reference value for the following parameters:
p50351, p50352 , p50353
r52285 to r52289, r52291, r52292, r52301, r52302, r52303, r52305
390
Calculated: -
Dyn. index: -
Unit group: -
Scaling: PERCENT
Max
100.0 [%]
Calculated: -
Dyn. index: -
Unit group: -
Scaling: -
Max
1.00
Calculated: -
Dyn. index: -
Unit group: -
Scaling: -
Max
2000 [Vrms]
List Manual (LH8), 02/2015, 6RX1800-0ED76
Access level: 1
Func. diagram: 6850, 6960
Unit selection: -
Expert list: 1
Factory setting
100.0 [%]
Access level: 2
Func. diagram: 6840, 8042
Unit selection: -
Expert list: 1
Factory setting
1.00
Access level: 1
Func. diagram: 6855, 6900,
6902, 6950, 6952, 6960
Unit selection: -
Expert list: 1
Factory setting
400 [Vrms]
SINAMICS DCM