Yaskawa Sigma-5 User Manual: Design and Maintenance - Linear Motors MECHATROLINK-III Communications Reference - Manual (Page 118)

4 Operation
4.4.4 Encoder Output Pulses
4-30
When Using a Linear Scale with Multiple Zero Points and Passing 1st Zero Point in
Reverse Direction and Returning after Power ON
When using a linear scale with multiple zero points, the same logic as that explained earlier for a linear scale
with only one zero point applies to each zero point.
See When Passing 1st Zero Point in Reverse Direction and Returning after Power ON .
To output the phase-C pulse when a detection point is passed in reverse, set the following parameter to 1.
Note: A SERVOPACK with software version 0023 or later supports this parameter.
Parameter Meaning When Enabled Classification
Pn081
n. 0
[Factory Setting]
Outputs phase-C pulse only in forward direction.
After restart Setup
n. 1
Outputs phase-C pulse in forward and reverse
direction.
• Setting of Pn081.0
Do not change the factory setting if the zero point position of the existing equipment
must remain as is.
• When Pn081.0=1, the width of the phase-C pulse output is narrower than that of
the phase-A pulse in some cases.
• As shown in the following figure, there is a one-eighth scale pitch difference in posi-
tions between the two settings (Pn081.0=1 and Pn081.0=0) for the phase-C pulse
output, the zero point return command, and the phase-C detection by phase-C
latch function.
Scale count-up direction
Power ON Time
Phase-C pulse output
Zero point 1 Zero point 3 Zero point 2 Zero point 2 Zero point 2
Phase-C pulse is not output when passing
a zero point in reverse direction.
Zero point 3
Linear
1/8 scale pitch
Pn081.0 = 0
Zero point
Zero point
Moves to forward
1 scale pitch
Pn081.0 = 1