WEG CFW-11 Series, Programming Manual

Page: 67 / 307

Programming Basic Instructions
5-7
5
P0208 – Reference Scale Factor
Adjustable
Range: 1 to 18000 Factory
Setting: 1800
(1500)
P0212 – Reference Decimal Point
Adjustable
Range: 0 = wxyz
1 = wxy.z
2 = wx.yz
3 = w.xyz Factory
Setting: 0
Properties:
Access groups
via HMI:
01 PARAMETER GROUPS
30 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 :
Table 5.4 - Synchronous speed reference in rpm
Frequency Number of Motor Poles Synchronous Speed in rpm
50 Hz
2 3000
4 1500
6 1000
8 750
60 Hz
2 3600
4 1800
6 1200
8 900
In order to indicate values in other units , use the following formulas:
P0002 = Speed x P0208
Synchronous Speed x (10)
P0212
P0001 = Reference x P0208
Synchronous Speed x (10)
P0212
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
P 0002 =
1800 x 900 = 90.0
1800 x (10)
1