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Parame‐
ter
p1250
Display of the switch-on level of the vdc-max controller.
Parame‐
ter
p1251
Setting for the integral-action time of the vdc controller.
The effective integral time can be determined using p1243.
Parame‐
ter
p1252
Setting for the derivative-action time of the vdc controller.
The active derivative-action time can be determined using p1243.
Parame‐
ter
p1254
Activates/deactivates automatic sensing of the switch-on level for the Vdc-max controller.
Values:
0: Automatic detection inhibited.
1: Automatic acquisition enabled
Settings
Parameter p1240 functions as a release:
● 0: Controller inhibited
● 1: Controller enabled
You use p1242 to define the starting point of the vdc-max controller. The starting point is the
maximum value of the DC link voltage that cannot be exceeded. If the DC link voltage is below
the starting point, the controller remains inactive. The controller gain can be changed by means
of p1250. The set ramp-down remains inactive while the vdc_max controller is active. The ramp-
down time increases the more excess kinetic energy is stored in the drive train.
SINAMICS SM150 6SL3815-7NP41-0AA1
Operating Instructions Rev.201910281301 EXAMPLE
Function
Vdc_controller proportional gain
Function
Vdc_controller integral time
Function
Vdc_controller derivative-action time
Function
Vdc_max_controller automatic ON level de‐
tection
Adjustment range
0.00 ... 10.00
Factory setting: 1.00
Adjustment range
1 ... 1000 ms
Factory setting: 40 ms
Adjustment range
1 ... 1000 ms
Factory setting: 1 ms
Adjustment range
1 / 0
Factory setting: 0
Operation
8.5 Functions
139
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