WEG CFW-09 User Manual page 127

CHAPTER 6 - DETAILED PARAMETER DESCRIPTION
[Factory Setting]
Parameter
(2)
P135
Speed Transition to I/F
Control
This parame-
ter is shown on the
display(s) only when
P202 = 3 (Sensorless
Vector Control)
P136
Current Reference
for I/F Mode
For Sensorless
Vector Control
(P202 = 3)
128
Range
Unit Description / Notes
b)
Figure 6.3 a) and b) - Speed limits considering the "Dead Zone" active (P233 = 1)
0 to 90
The speed at which the transition from Sensorless Vector Control to I/F
[ 18 ]
(Scalar Control with Imposed Current) occurs. The minimum speed
1 rpm
recommended for Sensorless Vector Control is 18 rpm for 60 Hz motors
and 15 rpm for 50 Hz motors, with 4 poles.
For P135 3 the CFW-09 will always operate in Sensorless Vector Mode
when P202 = 3, (there is no transition to the I/F Mode).
The current level to be applied on the motor in the I/F Mode is set at
P136.
Scalar Control with imposed current means only current control working
with current reference level adjusted by P136. There is no speed control,
just open loop frequency control.
Sets the current to be applied to the motor when in I/F Mode. I/F Mode
0 to 9
occurs when the motor speed is lower than the value defined by
[ 1 ]
parameter P135.
1
Speed
P134
P133
0
0 ....................... 100 %
0 .......................... 10 V
0 ....................... 20 mA
4 mA .................. 20 mA
10 V ............................ 0
20 mA ......................... 0
20 mA .................. 4 mA
Current in I/F Mode
P136
% of P410 (Imr)
0 100 %
1 111 %
2 122 %
3 133 %
4 144 %
5 155 %
6 166 %
7 177 %
8 188 %
9 200 %
Table 6.6 - Current reference for I/F mode
Speed
Reference