ADV100 • Functions description and parameters list 99
22.8-FUNCTIONS/VDCCONTROL
This function is used to control the voltage and power recovered in the DC link during regeneration (e.g. braking
ramp). When this function is enabled, if the power regenerated by the load during braking increases the DC link volt-
age, the drive prevents triggering of the Overvoltage alarm by limiting the regenerated current.
The Vdccontrolfunction is enabled automatically (if parameter 3450Vdccontrolfunction is set to 1) when the DC
link voltage exceeds a preset threshold, depending on the mains voltage and lower than the Overvoltage threshold.
This threshold is also used for the regulator that controls the regenerated current limit.
If the Vdccontrolfunction is enabled, the motor speed need not follow the set ramp.
If the regulator is unable to limit the regenerated power during the deceleration ramp and prevent the Overvoltage
alarm from being generated, the ramp can be temporarily blocked by setting parameter 754Rampfreezesrc using
the information in Vdcctrlrampfreeze.
The function remains enabled until the power regenerated by the load is cancelled and the DC link voltage falls below
the disable threshold (below the enable threshold).
Menu PAR Description UM Type FB BIT Def Min Max Acc Mod
22.8.1 3450 Vdccontrolfunction ENUM Disable 0 1 ERWZ FVS
This parameter is used to enable the Vdccontrolfunction.
0 Disable
1 Enable
If set to 0 the function is disabled: in case of power recovery the Sovratensione alarm is generated.
If set to 1 the function is enabled: in case of power recovery the function is enabled and attempts to control the cur-
rent regenerated by the motor and prevent the Overvoltage alarm from being generated.
Menu PAR Description UM Type FB BIT Def Min Max Acc Mod
22.8.2 3470 VdccontrolPgain A/V FLOAT CALCF 0.0 100.000 ERWS FVS
Setting of the proportional gain used during the Vdccontrolfunction. The set value must be increased if the Over-
voltage alarm is generated. The Sovratensione alarm can also be prevented by lengthening the deceleration ramp.
The value of this parameter must also be increased if the DC link voltage is set to a value other than the setpoint
Menu PAR Description UM Type FB BIT Def Min Max Acc Mod
22.8.3 3472 VdccontrolItime ms FLOAT CALCF 1.0 1000.0 ERWS FVS
Setting of the integral time used during the Vdccontrolfunction. The set value must be reduced if the DC link
voltage is set to a value other than the setpoint.
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