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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 1 2 3 4 5 6 7 8 0 7 6 5 4 3 2 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
0 1 2 3 4 5 6 7 8 0 7 6 5 4 3 2 1
Incremental count Decremental count