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Product Overview
1-8
High Speed Counter Encoder Module User Manual
Quadrature Modes of Counting (continued)
When set to 2X Quadrature Mode, the module counts both edges of input A
pulses, in both count directions.
Figure 1-5 shows the relationship between inputs A and B, and the count
value that results using 2X quadrature mode.
A
B
1
2
2
0
Pulse A leads: Count Up
Pulse B leads: Count Down
Counts both edges of input A
Encoder Pulses
Count Value:
3
4
3
1
Figure 1-5
2X Quadrature Mode
When set to 4X Quadrature Mode, the module counts both edges of both
input A pulses and input B pulses, in both count directions.
Figure 1-6 shows the relationship between inputs A and B, and the count
value that results using 4X quadrature mode.
A
B
1
3
4
0
Pulse A leads: Count Up
Pulse B leads: Count Down
Counts both edges of both inputs A and B
Encoder Pulses
Count Value:
5
7
6
2
2
4
6
8
7
5
3
1
Figure 1-6
4X Quadrature Mode
2X Quadrature
Counting Mode
4X Quadrature
Counting Mode