Yaskawa JAPMC-MC2300 - Manual (Page 71)

4.4 General-purpose I/O Mode
4.4.4 Pulse Input Modes
4-11
4
Operation Modes
( 3 ) Pulse A/B Mode
In pulse A/B mode, the counter counts pulses in the following manner.
Polarity: Positive logic
The counter counts up when the phase of pulse A input is delayed from pulse B.
The counter counts down when the phase of pulse A input is advanced to pulse B.
Polarity: Negative logic
The counter counts up when the phase of pulse A input is delayed from pulse B.
The counter counts down when the phase of pulse A input is advanced to pulse B.
The table below shows different pulse counting operations by combination of multiplier and polarity.
Pulse Counting Method Polarity Count Up (Forward Rotation) Count Down (Reverse Rotation)
Pulse A/B mode
(Input pulse multiplier: 1)
Positive
logic
Negative
logic
Pulse A/B mode
(Input pulse multiplier: 2)
Positive
logic
Negative
logic
Pulse A/B mode
(Input pulse multiplier: 4)
Positive
logic
Negative
logic
Pulse A
Pulse B
Pulse A
Pulse B
Pulse A
Pulse B
Pulse A
Pulse B
Pulse A
Pulse B
Pulse A
Pulse B
Pulse A
Pulse B
Pulse A
Pulse B
Pulse A
Pulse B
Pulse A
Pulse B
Pulse A
Pulse B
Pulse A
Pulse B