Rockwell Automation 1769-HSC Compact High Speed Counter Module - Manual (Page 26)

26 Rockwell Automation Publication 1769-UM006E-EN-P - July 2013
Chapter 2 Module Operation
Figure 5 - Quadrature Encoder Modes (direction inhibit = 0, direction invert = 0)
X2 Quadrature Encoder Mode Selection
The X2 Quadrature Encoder mode operates much like the X1 Quadrature
Encoder except that the resolution is doubled as shown in Figure 5 on
page 26 .
X4 Quadrature Encoder Mode Selection
The X4 Quadrature Encoder mode operates much like the X1 Quadrature
Encoder except that the resolution is quadrupled, as shown in Figure 5 on
page 26 .
Figure 6 shows how Direction Inhibit and Direction Invert affect the counter.
Quadrature
Encoder
Input A
A
Forward Rotation
Input B
Input Z
B
Z
Reverse Rotation
A
B
X1 Count
X2 Count
X4 Count