YASKAWA SGD7S-xxxDA0 series Product Manual page 215

7.5 Encoder Divided Pulse Output
7.5.1 Encoder Divided Pulse Output Signals
 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
Origin signal (Ref)
 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.
Pn081
(2081h)
Important
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.
7-20
Power ON
Phase C
Parameter

n. 0
Output phase-C pulses only in the forward
direction.
(default setting)
Output phase-C pulses in both the forward

n. 1
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, origin return command, or phase-C latch 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
Origin
The second pulse is half as
wide as the phase-A pulse.
Meaning
One linear encoder pitch
Origin
1/8 linear encoder pitch
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
When Enabled
After restart
Classification
Setup