Parker 890CD - Page 448

Programming
Page D-104 890CS Common Bus Supply - Frames B & D; 890CD Common Bus Drive and 890SD Standalone Drive - Frames B, C & D
8
9
10
11
A
B
C
D
1
2
3
4
5
6
7
E
Functional Description
A quadrature encoder uses 2 input signals (A and B), phase shifted by a quarter of a cycle (90°). Direction is obtained by
looking at the combined state of A and B.
A
B
Speed is calculated using the following function:
SPEED HZ =
Counts Per Second
Lines x 4
where counts per second are the number of edges received from the encoder. There are 4 counts per line.