1–6
Overview of the Incremental Encoder Module
Publication 1794-6.5.15 – December 1998
Count Pulses from Incremental Encoders
If countermode = 1, 2 or 3, then 1, 2 or 4 edges of the pulse train will be counted. The count
direction (up/down) is determined by the phase difference of the input signals A and B.
Counter Mode = 1, 2 or 3
Counter Register
Logic
A
B
Up/Down
Up/Down Counting using pulses at the inputs of A and B
1
2
3
2
1
Input A
Input B
Counter Value
Counting Up
Counting Down
Example 1 – Counter Mode = 1 (x1)
0
1
3
5
4
2
Input A
Input B
Counter Value
Counting Up
Counting Down
Example 2 – Counter Mode = 2 (x2)
0
2
4
3
1
1
5
9
8
4
Input A
Input B
Counter Value
Counting Up
Counting Down
Example 3 – Counter Mode = 3 (x4)
0
3
7
6
2
4
8
5
1
2
6
7
3
Pulse Counting Mode (001, 010. 011)
Содержание FLEX I/O 1794-ID2
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Страница 10: ...Table of Contents iv Publication 1794 6 5 15 December 1998 ...
Страница 20: ...1 10 Overview of the Incremental Encoder Module Publication 1794 6 5 15 December 1998 ...
Страница 74: ...7 4 Calibrating Your Incremental Encoder Module Publication 1794 6 5 15 December 1998 ...