9 Encoder Input Slave Unit
9 - 10
GX-series EtherCAT Slave Unit User’s Manual
When phase A/B phase difference pulse is input, the connection with external input devices
becomes as follows.
Code + pulse input
Input A is count pulse signal and input B is count direction control signal.
The count is incremented at rise of phase A when input B is ON and decremented at rise of phase A
when input B is OFF.
When code and pulses are input, the connection with external input devices becomes as follows.
Incremental/decremental pulse input
The count is incremented at rise of input A pulse and decremented at rise of input B pulse.
Encoder
A
B
Z
(Reset Input)
Input A
Input B
Input Z
Encoder Input Slave Unit
Counter value
0 123456
7
80765432
1
Incremental count Decremental count
Count pulse signal
Input A
Count direction
control signal
Input B
Encoder or other
pulse generators
Count pulse
Input A
Input B
Input Z
Encoder Input Slave Unit
Count direction
control
Sensor or
switch
Input A
Input B
Counter value
0123456
7
80765432
1
Incremental count Decremental count