Parameter descriptions
7.9.2 Voltage controller
670 Operation Mode (voltage controller)
The voltage controller contains the functions necessary for monitoring the DC link voltage.
− The DC link voltage which rises in generator operation (in example during the braking process) of
the motor is controlled to the set limit value by the voltage controller.
− The power failure regulation uses the rotation energy of the drive to bridge short-term power
failures.
The voltage controller is set with parameter
Operation Mode 670.
0 -
Off
The function is switched off. Brake and Motor chopper are active and
switch with the parameterized thresholds of P506 and P507.
1 -
Udc-Limitation active
DC link limitation active. Overvoltage controller switched on, the
Brake and Motor chopper are active and switch with the parameter-
ized thresholds of P506 and P507. Factory setting.
2 -
Mains Support active
Power failure regulation switched on. Brake and Motor chopper are
active and switch with the parameterized thresholds of P506 and
P507. Suitable for quick shutdown.
3 -
Udc-Limit. & Mains
Supp. active
Overvoltage controller and power failure regulation switched on, with
motor chopper.
12 -
Mains Support active,
Chopper not active
Power failure regulation switched on. During the Mains Support, mo-
tor and brake chopper are deactivated. In all other cases motor and
brake chopper are active and switch with the parameterized thresh-
13 -
Udc-Limit. & Mains
Supp. active, Chopper
not active
Overvoltage controller and power failure regulation switched on.
During the Mains Support, motor and brake chopper are deactivated.
In all other cases motor and brake chopper are active and switch
with the parameterized thresholds of P506 and P507.
The function motor chopper is available only in the field-orientated control methods in configuration
410 (parameter
Configuration 30).
When an operation mode with motor chopper is selected, set the
Trigger Threshold 507 < (Refer-
ence DC-Link Limitation
680 - 10 V). See chapter 7.10.5 "Motor chopper".
For synchronous motors (Configuration 30 = 610), the motor chopper function is
deactivated to prevent damages to the motor. The other functions of the voltage con-
troller are not affected by this.
For asynchronous motors in V/f control (
Configuration 30
= 110), the motor chopper
function is not operative. The other functions of the voltage controller are not affected
by this.
The brake chopper is active dependent of the setting of Reference DC-Link Limitation
680
. See chapter 7.10.4 “Brake chopper and brake resistor” for parameterizing the
215
Control functions 06/2013 Operating Instructions
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