Yaskawa Sigma-5 User Manual: Design and Maintenance - Rotary Motors - Analog Voltage and Pulse Train Reference - Manual (Page 309)

7 Utility Functions (Fn )
7-32
7.19 Origin Setting (Fn020)
When using an external absolute encoder for fully-closed loop control, this function is used to set the current
position of the external absolute encoder as the origin (zero point position).
This function can be used with the following products.
Mitutoyo Corporation
ABS ST780A series
Model: ABS ST78 A/ST78 AL
(1) Preparation
The following conditions must be met to set the origin.
• The write prohibited setting parameter (Fn010) must be set to Write permitted (P.0000).
• The servo ON signal (/S-ON) must be OFF.
(2) Operating Procedure
Use the following procedure.
• After execution of origin setting, the servo ready (/S-RDY) signal will become inactive
because the system position data will have been changed. Always turn the power
supply OFF and then ON again after execution of origin setting.
Step
Display after Opera-
tion
Keys Operation
1 Press the MODE/SET Key to select the utility function.
2 Press the UP or DOWN Key to select Fn020.
3
Press the DATA/SHIFT Key for approximately one second.
The display shown on the left appears.
4
Press the UP Key until "OSET5" is displayed.
Note:
If there is a mistake during key operations, "no_oP" will
flash for approximately one second and then "Fn000" will
be displayed again.
5
Press the MODE/SET Key to set the origin of the external
encoder.
After the setting is completed, "donE" flashes on the display
and the screen returns to the message shown on the left.
6
Press the DATA/SHIFT Key for approximately one second.
"Fn020" is displayed again.
7 To enable the change in the setting, turn the power OFF and ON again.
MODE/SET DATA/
MODE/SET DATA/
MODE/SET DATA/
MODE/SET DATA/
MODE/SET DATA/
MODE/SET DATA/