YASKAWA SGMJV User Manual page 286

8 Fully-closed Loop Control
8.1.6 Precautions When Using an External Incremental Encoder by Magnescale
 External Encoder with Multiple Zero Points and Passing First Zero Point in Reverse
Direction after Power ON
When you use an external encoder with multiple zero points, each zero point operates in the same manner as
described in 9.1.6
Scale count-up
direction
Zero point 1
detection position
Zero point 2
detection position
Zero point 3
detection position
Phase-C pulse
output
To output the encoder dividing phase-C pulse when moving in the reverse direction, set Pn081 to n.1.
Pn081
<NOTE>
The encoder output pulse is output in the forward and reverse directions regardless of the setting of Pn081
when a serial converter unit is used.
8-10

Passing First Zero Point in Reverse Direction and Returning after Power ON.
Power ON
Zero point 1
Phase-C pulse is not output when passing
a zero point in reverse direction.
Parameter
n.0
Outputs phase-C pulse only in forward direction.
[Factory Setting]
Outputs phase-C pulse in forward and reverse
n.1
direction.
Zero point 2 Zero point 2 Zero point 2 Zero point 3
Meaning
Time
Zero point 3
When Enabled Classification
After restart Setup