Setting The Vdc Controller - Siemens SINAMICS V20 Operating Instructions Manual

Commissioning via the built-in BOP
5.6 Function commissioning
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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SINAMICS V20 Inverter
Operating Instructions, 11/2016, A5E34559884-006