ADV200 • Functions description and parameters list 139
22.13 - FUNCTIONS/VDC CONTROL
This function is used to control the voltage and power recovered in the DC link during regeneration (e.g. during 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 Vdc control function is enabled automatically (if parameter 3450 Vdc control function 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 Vdc control function 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 754 Ramp freeze src using
the information in Vdc ctrl ramp freeze.
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
22.13.1 3450 Vdc control function ENUM Disable 0 1 ERWZ FVS
This parameter is used to enable the Vdc control function.
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
current regenerated by the motor and prevent the Overvoltage alarm from being generated.
Menu PAR Description UM Type FB BIT Def Min Max Acc Mod
22.13.21 3470 Vdc control P gain A/V FLOAT CALCF 0.0 100.000 ERWS FVS
Setting of the proportional gain used during the Vdc control function. The set value must be increased if the
Overvoltage alarm is generated. The Sovratensione alarm can also be prevented by lengthening the decelera-
tion 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
22.13.3 3472 Vdc control I time ms FLOAT CALCF 1.0 1000.0 ERWS FVS
Setting of the integral time used during the Vdc control function. The set value must be reduced if the DC
link voltage is set to a value other than the setpoint.
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