Functions
8.19 Closed-loop Vdc control
Control Units CU240S
8-142 Operating Instructions, 11/2006, A5E00766042B AA
When the line supply returns, the energy feed is again from the line side and the output
frequency of the inverter returns to the selected setpoint along the ramp defined by the
ramp-function generator.
Note
When the DC link voltage falls below the minimum V
DC_min
, fault F0003 "Undervoltage" is
output and the inverter is shut down. The shutdown threshold V
DC_min
depends on the
inverter type and line supply voltage.
For the SINAMICS G120 the DC link undervoltage shutdown threshold is 430 V.
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