WEG CFW300 V1.3X, Programming Manual

Page: 78 / 157

VVW Vector Control
10-6 | CFW300
10
Description:
Parameter P408 in 1 activates the self-tuning of the VVW mode, where the motor stator resistance is measured.
The self-tuning can only be activated via HMI, and it can be interrupted at any time with the key.
During the self-tuning, the bar graph shows the progress of the operation and the motor remains still, because
a DC signal is sent to measure the stator resistance.
If the estimated value of the motor stator resistance is too high for the inverter used (for example: motor not
connected or motor too small for the inverter) the inverter indicates fault F033.
At the end of the self-tuning process, the measured motor stator resistance is saved in P409.
P409 - Stator Resistance
Adjustable
Range:
0.01 to 99.99 Ω Factory
Setting:
According
inverter
model
Properties:
cfg, V VW
Description:
Motor phase stator resistance in ohms (Ω), assuming a star (Y) motor connection.
If the value adjusted in P409 is too high or too low for the inverter used, the inverter indicates fault F033. In
order to exit this condition, just perform a reset by using the I/O key. In this case, P409 will be loaded with the
factory default value.
10.2 START-UP IN VVW MODE
NOTE!
Read chapter 3 Installation and Connection of the user’s manual before installing, powering up or
operating the inverter.
Sequence for installation, verification, power up and start-up:
1. Install the inverter: according to chapter 3 Installation and Connection of the user’s manual, making all the
power and control connections.
2. Prepare and power up the inverter: according to section 3.2 Electrical Installation of the user’s manual.
3. Load the correct factory default in P204: based on the motor rated frequency (set P204 = 5 for 60 Hz
motors and P204 = 6 for 50 Hz motors).
4. Adjustment of parameters and specific functions for the application: program the digital and analog
inputs and outputs, HMI keys, etc., according to the application requirements.
5. Activation of the V VW control: set P202 = 5 and parameters P399, P400, P401, P402, P403, P404 and
P407 according to the motor nameplate. Also set the value of P409. If some of those data are not available,
enter the approximate value by calculation or by similarity with WEG standard motor - see
Table 10.1 on page
10-3 .
6. Self-Tuning of the V VW control: the self-tuning is activated by setting P408 = 1. In this process, the inverter
applies DC to the motor to measure the stator resistance, while the HMI bar graph shows the progress of the
self-tuning. The self-tuning process can be interrupted at any time by pressing the key.