6.19 Origin Setting (Fn020)
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Utility Functions (Fn)
6.19 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 ST78A/ST78AL
(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 servomotor power 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 Operation Keys Operation
1
Press the Key to view the main menu for the
utility function.
Use the or Key to move through the list and
select Fn020.
2
Press the Key. The display changes to the Fn020
execution display.
3
Press the or Key to "ORGSET5".
4
Press the key to start setting the origin. The mes-
sage, "Scale Origin Set," flashes while the origin is
being set. After the origin has been successfully set,
the displayed status changes as follows: "BB" to
"DONE" to "BB".
5 To enable the change in the setting, turn the power OFF and ON again.
BB − FUNCTION−
Fn01F:FBOpMot ID
Fn020:S− Orig Set
Fn030:Soft Reset
Fn080:Pole Detect
BB
Scale Origin Set
ORGSET1
BB
Scale Origin Set
ORGSET5
BB
Scale Origin Set
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