CG CDN40-012-65, Hardware Manual

Page: 59 / 72

Commissioning
Before you start
6
CG Drives & Automation 55

Tip!
In the Default setting, the VFCplus motor control (V/f characteristic control)
with linear characteristic is set in C00006.

VFCplus is especially suitable for the operation of machines with a linear
or square−law load torque characteristic (e. g. fan).

The parameters are preset so that, with an inverter that is adapted in terms
of power and a 50 Hz motor, the inverter is ready for operation without
further parameterisation and the motor is working satisfactorily.
Recommendations for the following application cases:

Inverter and motor differing strongly in terms of power:
– Set code C00022 (I
max
limit in motor mode) to 2 × I
rated
motor.

High starting torque:
– Set code C00016 (Vmin boost) in no−load operation of the motor, so that
the rated motor current is flowing with a rotating field frequency f = 3 Hz
(C00058).

Noise optimisation:
– Set code C00018 to the value "3" (switching frequency 16 kHz).

High torque at low speeds (without feedback):
– Select "Vector control" operating mode.