6.19 Origin Setting (Fn020)6-316 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 currentposition of the external absolute encoder as the origin (zero point position).This function can be used with the following products.Mitutoyo CorporationABS ST780A seriesModel: ABS ST78A/ST78AL(1) PreparationThe following conditions must be met to set the origin.• The write prohibited setting (Fn010) must be set to Write permitted (P.0000).• The servomotor power must be OFF.(2) Operating ProcedureUse the following procedure.• After execution of origin setting, the servo ready (/S-RDY) signal will turn OFF (open)because the system position data will have been changed. Always turn the powersupply to the SERVOPACK OFF and ON again.Step Display after Operation Keys Operation1Press the Key to view the main menu for theutility function.Use the or Key to move through the list andselect Fn020.2 Press the Key. The display changes to the Fn020execution display.3 Press the or Key to "ORGSET5".4Press the key to start setting the origin. The mes-sage, "Scale Origin Set," flashes while the origin isbeing set. After the origin has been successfully set,the displayed status changes as follows: "BB" to"DONE" to "BB".5 To enable the setting, turn the power supply to the SERVOPACK 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 DF n 0 2 0 : S − O r i g S e tF n 0 3 0 : S o f t R e s e tF n 0 8 0 : P o l e D e t e c tB BS c a l e O r i g i n S e tO R G S E T 1B BS c a l e O r i g i n S e tO R G S E T 5B BS c a l e O r i g i n S e t
