YASKAWA SGD7S Product Manual page 206

 When Passing the First Origin Signal (Ref) in the Reverse Direction and Returning
after Turning ON the Power Supply
Machine position (forward)
Origin detection
position
Origin detection
position
Power ON
Origin signal (Ref)
Phase C
 Precautions When Using a Linear Incremental Encoder from Magnes-
cale Co., Ltd.
 Encoder Divided Phase-C Pulse Output Selection
You can also output the encoder's phase-C pulse for reverse movement. To do so, set Pn081
to n.1.
Parameter

n. 0
(default setting)
Pn081

n. 1
Precautions on Setting the Phase-C Pulse Output Selection (Pn081 = n.X)
• If you set Pn081 to n.1 (Output phase-C pulses in both the forward and reverse direc-
tions), the width of the phase-C pulse output may be narrower than the width of the phase-A
pulse.
Important
• There is a difference of 1/8th of the scale pitch in the phase-C detection position for the
encoder's phase-C pulse output position or origin return command between when Pn081 =
n.X is set to 0 (Output phase-C pulses only in the forward direction) and when it is set to
1 (Output phase-C pulses in both the forward and reverse directions).
Movement in the forward direction

Pn081 = n. 0

Pn081 = n. 1
Observe the following precaution if you set Pn081 to n.0 (Output phase-C pulses only in
the forward direction).
When a linear incremental encoder from Magnescale Co., Ltd. is used, the count direction of
the encoder determines how the phase-C pulse (CN1-21 and CN1-22) is output.
Note: The count direction (up or down) of the linear encoder determines whether a phase-C pulse is output. The
output of the pulse does not depend on the setting of the movement direction (Pn000 = n.1).
Encoder Model Interpolator
SL710
PL101-RY
SL720
MJ620-T13
SL730
SR75
SR85
Meaning
Output phase-C pulses only in the forward
direction.
Output phase-C pulses in both the forward
and reverse directions.
One linear encoder pitch
Origin
1/8 linear encoder pitch
Origin
Linear Encoder Pitch [μm]
6.5 Encoder Divided Pulse Output
6.5.1 Encoder Divided Pulse Output Signals
No origin signal (Ref) is output by the incremental linear
encoder. However, a phase-C pulse will be output from
the SERVOPACK when the motor moves in the forward
direction, because this is the same position from which a
phase-C pulse was output when the motor moved in the
reverse direction.
Time
The second pulse is half as
wide as the phase-A pulse.
When Enabled
After restart
800
800
800
80
80
Classification
Setup
6
6-11