Commissioning via the built-in BOP
5.6 Function commissioning
SINAMICS V20 Converter
106 Operating Instructions, 10/2019, A5E34559884-012
Setting parameters
You only have to change the factory default settings of the Imax controller if the converter
tends to oscillate when it reaches the current limit or it is shut down due to overcurrent.
This parameter defines the nominal motor current from rating plate.
P0640[0...2] Motor overload factor [%] This parameter defines motor overload current limit relative to P0305 (rated
P1340[0...2] Imax controller propor-
tional gain
This parameter defines the proportional gain of the Imax controller.
Range: 0.000 to 0.499 (factory default: 0.030)
P1341[0...2] Imax controller integral
time [s]
This parameter defines the integral time constant of the Imax controller. Setting
P1341 to 0 disables the Imax controller.
Range: 0.000 to 50.000 (factory default: 0.300)
P1345[0...2] Imax voltage controller
proportional gain
This parameter sets the proportional gain of Imax voltage controller. If the out-
put current (r0068) exceeds the maximum current (r0067), the converter is
dynamically controlled by reducing the output voltage.
Range: 0.000 to 5.499 (factory default: 0.250)
P1346[0...2] Imax voltage controller
integral time [s]
This parameter defines the integral time constant of the Imax voltage controller.
Range: 0.000 to 50.000 (factory default: 0.300)
Status of motor control: Imax controller active
5.6.2.8 Setting the Vdc controller
Functionality
If ramp-down time is too short, the converter may display the alarm A911 which means the
DC link voltage is too high. The Vdc controller dynamically controls the DC link voltage to
prevent overvoltage trips on high inertia systems.
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