WEG CFW-11 Programming Manual page 67

P0208 – Reference Scale Factor
Adjustable 1 to 18000
Range:
P0212 – Reference Decimal Point
Adjustable 0 = wxyz
Range: 1 = wxy.z
2 = wx.yz
3 = w.xyz
Properties:
Access groups 01 PARAMETER GROUPS
via HMI:
Description:
They define how the Speed Reference (P0001) and the Motor Speed (P0002) will be presented when the motor runs
at the synchronous speed.
In order to indicate the value in rpm, P0208 must be adjusted at the motor synchronous speed according to the
Table 5.4 on page 5-7:
Frequency
50 Hz
60 Hz
In order to indicate values in other units, use the following formulas:
Speed x P0208
P0002 =
Synchronous Speed x (10)
Reference x P0208
P0001 =
Synchronous Speed x (10)
Where,
Reference = Speed reference, in rpm.
Speed = Actual speed, in rpm.
Synchronous Speed = 120 x Motor Rated Frequency (P0403)/Nr. of Poles.
Nr. of Poles = 120 x P0403 / Motor Rated Speed (P0402), and can be equal to 2, 4, 6, 8 or 10.
Example:
If Speed = Synchronous Speed = 1800,
P0208 = 900,
P0212 = 1 (wxy.z), then
P0002 = 1800 x 900
1800 x (10)
30 HMI
Table 5.4 - Synchronous speed reference in rpm
Number of Motor Poles
2
4
6
8
2
4
6
8
P0212
P0212
= 90.0
1
Programming Basic Instructions
Factory
Setting:
Factory
Setting:
Synchronous Speed in rpm
3000
1500
1000
750
3600
1800
1200
900
1800
(1500)
0
5
5-7