WEG CFW300 V1.3X, Programming Manual

Page: 90 / 157

Functions Common to All the Control Modes
11-10 | CFW300
11
P301 - Frequency to Begin DC Braking at Stop
Adjustable
Range:
0.0 to 400.0 Hz
Factory
Setting:
3.0 Hz
Properties:
Description:
This parameter establishes the initial point to apply the DC Braking at the stop when the inverter is disabled by
ramp, as per
Figure 11.8 on page 11-9 .
P302 - Voltage Applied to the DC Braking
Adjustable
Range:
0.0 to 100.0 % Factory
Setting:
20.0 %
Properties:
Description:
This parameter sets the DC voltage (DC Braking torque) applied to the motor during the braking.
The setting must be done by gradually increasing the value of P302, which varies from 0.0 to 100.0 % of the
rated braking voltage, until the desired braking is obtained.
The rated braking voltage is the DC voltage value, which results in the rated current for the motor with power
matched to the inverter. Therefore, if the inverter has a power too much higher than the motor, the braking
torque will be too low. On the other hand, if the opposite is true, overcurrent may occur during the braking, as
well as overheating of the motor.
11.5 SKIP FREQUENCY
This inverter function prevents the motor from operating permanently at frequency values in which, for example,
the mechanical system goes into resonance (causing excessive vibration or noises).
P303 - Skip Frequency 1
Adjustable
Range:
0.0 to 400.0 Hz Factory
Setting:
0.0 Hz
P304 - Skip Frequency 2
Adjustable
Range:
0.0 to 400.0 Hz
Factory
Setting:
0.0 Hz
P306 - Skip Band
Adjustable
Range:
0.0 to 25.0 Hz Factory
Setting:
0.0 Hz
Properties:
Description:
The actuation of those parameters is done as presented in Figure 11.9 on page 11-11 below.
The passage by the skip frequency band (2 x P306) is done through acceleration/deceleration ramp.
The function does not operate correctly if two bands of "Skip Frequency" overlap.