6.19 Origin Setting (Fn020)
6-31
6
Util
ity Fu
nctions (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 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 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.
B B
−
F U N C T I O N
−
F n 0 1 F : F B O p M o t I D
F n 0 2 0 : S
−
O r i g S e t
F n 0 3 0 : S o f t R e s e t
F n 0 8 0 : P o l e D e t e c t
B B
S c a l e O r i g i n S e t
O R G S E T 1
B B
S c a l e O r i g i n S e t
O R G S E T 5
B B
S c a l e O r i g i n S e t
