Yaskawa Sigma II Series DC Power Input SGMAJ - Manual (Page 153)

7.2 Operation in Utility Function Mode (Fn†††)
7-9
7
7.2.3 Zero-point Search Mode (Fn003)
The zero-point search mode is designed to perform positioning to the zero-point pulse (phase-C) position of the
encoder and to clamp at the position.
This mode is used when the motor shaft needs to be aligned to the machine.
Execute the zero-point search without connecting the motor shaft with the machine.
The speed for executing the zero-point search is 60 min
-1
.
The following conditions must be met to perform the zero-point search operation.
• If the Servo-ON input signal (/S-ON) is ON, turn it OFF.
• Release the Servo-ON signal mask if the parameter Pn 50A.1 is set to 7, and the servo has been set to
always be ON.
Follow the procedure below to execute the zero-point search.
• Forward run prohibited (P-OT) and reverse run prohibited (N-OT) signals are disabled during zero-point
search mode operations using Fn003.
CAUTION
Step
Display after
Operation
Key Description
1 Press the DSPL/SET Key to select the utility function mode.
2 Press the UP or DOWN Key to select the Fn003.
Note: The enabled digit blinks.
3 Press the DATA/ENTER Key, and the display will be as
shown on the left.
4 Press the SVON Key.
The servo turns ON.
5 When the parameter is set to Pn000.0 = 0 (default), pressing
the UP Key will rotate the motor in the forward direction.
Pressing the DOWN Key will rotate the motor in the reverse
direction. When the parameter is set to Pn000.0 = 1, the rota-
tion direction of the motor is reversed.
6
Display blinks.
When the motor zero-point search is completed, the display
blinks.
At this moment, the motor is servo-locked at the zero-point
pulse position.
7 Press the DATA/ENTER Key.
Fn003 display appears again.
The motor will be servo OFF status.
For aligning the motor
shaft with the machine
DSPL
SET
(DSPL/SET Key)
DATA
ENTER
(DATA/ENTER Key)
JOG
SVON
(SVON Key)
DATA
ENTER
(DATA/ENTER Key)