Siemens SINAMICS V20 Series

Commissioning
5.6 Function commissioning
SINAMICS V20 Inverter
Operating Instructions, 07/2012, A5E03728167
81
5.6.2.8 Setting the Vdc controller
Functionality
If ramp-down time is too short, the inverter 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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