YASKAWA SGDV-OCA05A

6.5 Encoder Divided Pulse Output
6.5.1 Encoder Divided Pulse Output Signals
6-11
6
Application Functions
 When Passing the First Origin Signal (Ref) in the Reverse Direction and Returning
after Turning ON the Power Supply
 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.
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).
Parameter Meaning When Enabled Classification
Pn081
n.0
(default setting)
Output phase-C pulses only in the forward
direction.
After restart Setup
n.1
Output phase-C pulses in both the forward
and reverse directions.
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.
• 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).
Encoder Model Interpolator Linear Encoder Pitch [μm]
SL710
PL101-RY
MJ620-T13
800
SL720 800
SL730 800
SR75 80
SR85 80
Machine position (forward)
Origin detection
position
Origin detection
position
Power ON
Origin signal (Ref)
Phase C
Time
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.
The second pulse is half as
wide as the phase-A pulse.
Important
Pn081 = n.0
Pn081 = n.1
Movement in the forward direction
One linear encoder pitch
Origin
1/8 linear encoder pitch
Origin