SINAMICS DCP
List Manual (LH21), 05/2016
295
2 Parameters
2.2 List of parameters
Description: Sets the enable signal for the individual bridges.
Value: 1: Bridge 1 enabled
2: Bridge 2 enabled
3: All bridges enabled
4: Bridge 3 enabled
Description: Sets the modulator frequency.
The 100% value corresponds to the rated power unit frequency.
Description: Activates the simultaneous step-down and step-up in the transition range between stepping-down and stepping-up.
Value: 0: Deactivated
1: Activated
2: Activated with frequency derating
Description: Sets the operating mode for the modulator switching frequency.
Value: 0: Fixed switching frequency
1: Variable switching frequency
Note: For p55322 = 0:
Fixed switching frequency (according to parameter p55320).
For a fixed switching frequency, at a specific operating point (= ratio between the input and output voltages), the
maximum current ripple is obtained. The current ripple is very low at other operating points. However, the low current
ripple does not represent an advantage. A high switching frequency results in switching losses. This means a lower
device efficiency, which has a negative impact on energy efficiency and energy costs.
For p55322 = 1:
For a variable switching frequency, depending on the particular operating point, the switching frequency is reduced,
so that the maximum current ripple is obtained at all operating points. This improves the efficiency at many operating
points.
Description: Display and connector output for the actual switching frequency of the modulator.
p55310 Modulator individual bridge enable / Mod indiv br enab
DCP_CTRL Can be changed: U, T Access level: 2
Data type: Integer16 Func. diagram: 6830
Min Max Factory setting
1 4 3
p55320 Modulator frequency / Modulator freq
DCP_CTRL Can be changed: U, T Access level: 4
Data type: FloatingPoint32 Func. diagram: 6830
Min Max Factory setting
25.000 [%] 100.000 [%] 100.000 [%]
p55321 Modulator optimize step-down/step-up transition / Mod opt step-dn/up
DCP_CTRL Can be changed: U, T Access level: 3
Data type: Integer16 Func. diagram: 6830
Min Max Factory setting
0 2 1
p55322 Modulator switching frequency operating mode / Mod f_sw op_mode
DCP_CTRL Can be changed: U, T Access level: 3
Data type: Integer16 Func. diagram: 6830
Min Max Factory setting
0 1 0
r55325 CO: Modulator switching frequency / Modulator f_switch
DCP_CTRL Can be changed: - Access level: 3
Data type: FloatingPoint32 Func. diagram: 6830
Min Max Factory setting
- [Hz] - [Hz] - [Hz]
Siemens Parts
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