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CHAPTER 8 FUNCTIONS
8
8.1 Pulse Input Modes and Counting Methods
8.1.1 Types of pulse input modes
(a) 1-phase pulse input
The count method can be selected from 1 multiple and 2 multiples.
The following figure shows the relationship between phase A pulse input and phase B pulse input or CH
Down count command (Y3, YB).
(b) CW/CCW pulse input
Pulses can be counted up with the A phase pulse input and counted down with the B phase pulse input.
The following figure shows the relationship between A phase pulse input and B phase pulse input.
(c) 2-phase pulse input
The count method can be selected from 1 multiple, 2 multiples, and 4 multiples.
The phase difference between the A phase pulse and B phase pulse determines whether the pulses are
counted up or down.
The following figure shows the relationship between A phase pulse input and B phase pulse input.
A
B
Pulse input
Encoder
High-speed counter module
B or CH Down count command
(Y3, YB)
Count-up pulse input
Count-down pulse input
Encoder
Encoder
A
B
High-speed counter module
Phase A pulse input
Phase B pulse input
A
B
Encoder
High-speed counter module