YASKAWA SGD7S series Product Manual page 248

6.8 Encoder Divided Pulse Output
6.8.1 Encoder Divided Pulse Output Signals
 When First Passing the Origin Signal in the Forward Direction and Returning after
Turning ON the Power Supply
The encoder's phase-C pulse (CN1-19 and CN1-20) is output when the origin detection posi-
tion is passed for the first time in the forward direction after the power supply is turned ON.
After that, the phase-C pulse is output whenever the origin detection position is passed in the
forward or reverse direction.
Encoder count-up
direction
Origin detection
po ition
Pha e-C pul e
output
 When First Passing the Origin Signal in the Reverse Direction and Returning after
Turning ON the Power Supply
The encoder's phase-C pulse (CN1-19 and CN1-20) 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 is output, it will then also be output when the origin detection point is passed in
the reverse direction.
Encoder count-up
direction
Origin detection
po ition
Pha e-C pul e
output
 When Using a Linear Encoder with Multiple Origins and First Passing the Origin Posi-
tion in the Forward Direction and Returning after Turning ON the Power Supply
The encoder's phase-C pulse is output when the origin detection position is passed for the first
time in the forward direction after the power supply is turned ON. After that, the phase-C pulse
is output whenever the origin detection position is passed in the forward or reverse direction.
Encoder count-up
direction
Origin 1 detection
po ition
Origin 2 detection
po ition
Pha e-C pul e
output
6-50
Power ON
po ition
Power ON
po ition
Power ON
Origin 1
Origin 1
The ERVOPACK record the po ition where
the pha e-C pul e wa output for movement
in the forward direction, and the pha e-C
pul e i al o output for rever e movement.
Time
The pha e-C pul e i not
output when the detection
po ition i pa ed in the
rever e direction.
Time
The ERVOPACK record the po ition where
the pha e-C pul e wa output for movement
in the forward direction, and the pha e-C
pul e i then output for rever e movement.
The ERVOPACK record the po ition where
the pha e-C pul e wa output for movement
in the forward direction, and the pha e-C
pul e i al o output for rever e movement.
Time
Even after origin 1 ha been pa ed in
the forward direction, the pha e-C pul e
i not output here becau e origin 2 i
pa ed in the rever e direction.
Origin 2 Origin 2