YASKAWA SGD7S-****20A Series Product Manual page 213

6.5 Encoder Divided Pulse Output
6.5.1 Encoder Divided Pulse Output Signals
 When Using a Linear Encoder with Multiple Origins and First Passing the Origin Posi-
tion in the Reverse Direction after Turning ON the Power Supply
The encoder's phase-C pulse is not output when the origin detection position is passed for the
first time in the reverse direction after the power supply is turned ON.
However, after the origin detection position is passed in the forward direction and the encoder's
phase-C pulse it output, it will then also be output when the origin detection point is passed in
the reverse direction.
Encoder count-up
direction
Origin 1 detection
po ition
Origin 2 detection
po ition
Origin
po ition
Pha e-C pul e
output
6-24
The pha e-C pul e i not
output.
detection
Power ON
Origin 1 Origin 2
Time
Origin Origin