Product Overview
1-9
High Speed Counter Encoder Module User Manual
1.4
Non-Quadrature Modes of Counting
When you select the up/down counting mode, two input pulse signals
determine the count value. (Refer to Figure 1-7.)
•
With input B high, the count increments on the rising edge of input A.
•
With input A high, the count decrements on the rising edge of input B.
For proper counting, the input without the clock must be held high or on;
otherwise, the count value that results cannot be defined.
A
5
6
7
8
Count Value:
7
4
B
5
6
Up Count
Down Count
Up/Down Pulse Counting Mode
Figure 1-7
Up/Down Counting
When you select direction counting mode, the input B signal controls the
count values of the input A pulse. (Refer to Figure 1-8.)
•
With input B low, the count increments on the rising edge of input A.
•
With input B high, the count decrements on the rising edge of input A.
For proper counting, input A must be high during the transition of input B;
otherwise, the count value that results can not be defined.
A
4
3
2
1
Count Value:
2
5
B
4
3
Up/Down Direction Counting Mode
Down Counting
Up Counting
Figure 1-8
Direction Counting
Up/Down Counting
Overview
Direction Counting
Overview
