YASKAWA E-7-Series SGD7S - Page 215

6.8 Encoder Divided Pulse Output
6.8.1 Encoder Divided Pulse Output Signals
6-46
 When Passing the First Origin Signal (Ref) in the Forward Direction and Returning
after Turning ON the Power Supply
 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.
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 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).
Machine position (forward)
Origin detection
position
Origin detection
position
Power ON
Origin signal (Ref)
Phase C
The second pulse is half as
wide as the phase-A pulse.
Time
No origin signal (Ref) is output by the external encoder. However, a phase-C
pulse will be output from the SERVOPACK when the motor moves in the
reverse direction, because this is the same position from which a phase-C
pulse was output when the motor moved in the forward direction.
S
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 external 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.
S
Important
Pn081 = n.0
Pn081 = n.1
Movement in the forward direction
One linear encoder pitch
Origin
1/8 linear encoder pitch
Origin