Control Techniques SM-Encoder Output Plus, Руководство пользователя

Страница: 32 / 42

32
SM-Encoder Plus & SM-Encoder Output Plus User Guide
www.controltechniques.com Issue: 4
SM-Encoder Output Plus only
The encoder simulation system provides an encoder output with minimal delay from
either the drive encoder (Pr
x.24 = 3.29) or the encoder connected to this option module
(Pr x.24 equal to any other value). The drive encoder can be an incremental encoder
(Ab, Fd, Fr, Ab.Servo, Fd.Servo, Fr.Servo) or it can be a SINCOS encoder (SC,
SC.Hiper, SC.EnDat or SC.SSI). If any other encoder types are selected the output is
undefined. If a SinCos type encoder is being used the encoder simulation is derived
from the sine waves and does not include interpolation information.
SM-Encoder Output Plus only
The ratio between the change of encoder position and the change of encoder simulation
output position is defined by Pr
x.25 . The table below shows the possible ratios.
For example, if the source encoder has a resolution of 4096 lines per revolution and
Pr
x.25 set to 0.2500 (a ratio of ¼), the output resolution will be 1024 lines per
revolution.
SM-Encoder Output Plus only
Pr x.28 selects the format of the encoder simulation output as shown in the table below.
x.24 Encoder simulation source
RO Uni PT US
Ú
0.00 to 21.51
Ö
0.00
Update rate: Read on reset
x.25 Encoder simulation ratio numerator
RO Uni PT US
Ú 0.0000 to 3.0000 Ö
0.2500
Update rate: Background read
Pr x.25 Ratio
0.0000 to 0.0312 1/32
0.0313 to 0.0625 1/16
0.0626 to 0.1250 1/8
0.1251 to 0.2500 1/4
0.2501 to 0.5000 1/2
0.5001 to 3.0000 1
x.28 Encoder simulation mode
RO Uni US
Ú
0 to 7
Ö
0
Update rate: Background read
Pr x.28 Mode
0 Ab Quadrature outputs
1 Fd Frequency and direction outputs
2 Fr Forward and reverse outputs
3 Ab.L Quadrature outputs with marker lock
4 to 7 Fd.L Frequency and direction outputs with marker lock