Omron CPM2C-S100C Operation Manual page 60

Specifications
Input
Differential phase mode
IN00000 A-phase pulse input
IN00001 B-phase pulse input
IN00002 Z-phase pulse input or hardware reset input
(IN00002 can be used as a normal input when it is not used as a high-speed counter input.)
Pulse plus direction input mode, Up/down input
mode, Increment mode
38
High-speed Counter Inputs
The following CPU Unit input bits can be used as high-speed counter inputs.
The maximum count frequency is 5 kHz in differential phase mode and
20 kHz in the other modes.
Pulse plus direction
input mode
Pulse input
Direction input
The minimum pulse widths for inputs IN00000 (A-phase input) and IN00001
(B-phase input) are as follows:
50 µs min.
12.5 µs 12.5 µs
min. min.
The minimum pulse width for input IN00002 (Z-phase input) is as follows:
Interrupt Inputs
CPM2C-S PCs are equipped with inputs that can be used as interrupt inputs
(interrupt input mode or counter mode) and quick-response inputs. The mini-
mum pulse width for these inputs is 50 µs.
Inputs IN00003 and IN00004 can be used as interrupt inputs.
Function
Up/down input mode
Increment pulse input
Decrement pulse input
Differential phase mode
100 µs min.
Phase A
Phase B
T T
1 2
T T
1
50 µs min.
Phase Z
500 µs min.
Section 2-1
Increment mode
Increment pulse input
Normal input
T T
3 4
: 12.5 µs min.
T T
2 3 4