High-Speed Counters 1 To 4 - Omron CQM1H - PROGRAM Programming Manual

High-speed Counter Board
2-1-7

High-speed Counters 1 to 4

Overview of Process
Input Signals and Input
Modes
The High-speed Counter Board counts pulse signals entering through ports 1
to 4 from rotary encoders and outputs internal/external output bit patterns
according to the number of pulses counted. The four ports can be used inde-
pendently. An outline of the processing performed by high-speed counters 1
to 4 is provided below.
High-speed counters 1 to 4 can be set to different Input Modes in response to
the type of signal input.
Differential Phase Mode (Counting Speed: 25 kHz or 250 kHz)
Two phase signals (phase A and phase B) with phase difference multiples of
1x, 2x, or 4x are used together with a phase-Z signal for inputs. The count is
incremented or decremented according to differences in the two phase sig-
nals.
Up/Down Mode (Counting Speed: 50 kHz or 500 kHz)
Phase A is the incrementing pulse and phase B is the decrementing pulse.
The counter increments or decrements according to the pulse that is
detected.
Pulse/Direction Mode (Counting Speed: 50 kHz or 500 kHz)
Phase A is the pulse signal and phase B is the direction signal. The counter
increments when the phase-B signal is ON and decrements when it is OFF.
Differential Phase Mode
Phase A
Phase B
1x
2x
4x
Phase A Phase B
↑
L Increment
↑
H ---
↓
H ---
↓
L ---
↑
L ---
↑
H ---
↓
H ---
↓
L Decrement
1x 2x
Increment
---
Increment
---
---
Decrement
---
Decrement
Section 2-1
4x
Increment
Increment
Increment
Increment
Decrement
Decrement
Decrement
Decrement
69