7
Motion Commands
7.2.3
Zero Point Return (ZRET)
7-30
[ i ] HOME LS Signal Method (OW

3C = 15)
z
Operation after Zero Point Return Starts
Travel is started at the creep speed in the direction specified by the sign of the creep speed.
When the rising edge of the home signal is detected, positioning is performed at the positioning
speed.
When the positioning has been completed, a machine coordinate system is established with the final
position as the zero point.

The moving amount after the rising edge of the home signal is detected is set in the Home Offset.
The positioning speed is set in the Speed Reference Setting.

If an OT signal is detected during creep speed operation, an alarm will not occur, the direction will
be reversed, and a search will be made for the home signal.

If an OT signal is detected during positioning speed operation, an OT alarm will occur.
Detecting the OT Signal during Creep Speed Movement
* 1. The SERVOPACK EXT1 signal.
* 2. The SERVOPACK P-OT signal.
* 3. The SERVOPACK N-OT signal.

The stopping method when the OT signal is detected depends on the setting of SERVO-
PACK parameters.
z
Setting Parameters
HOME signal
*1
NOT
*3
POT
*2
Start Zero Point
Creep Speed
(OL40)
Positioning Speed
(OL10)
Home Offset
(OL42)
HOME LS signal
*1
NOT
*3
POT
*2
StartZero Point
Positioning Speed
(OL10)
Home Offset
(OL42)
Creep Speed
(OL40)
Creep Speed
(OL40)
Parameter Name Setting
OW

3C
Home Return Type
15: HOME LS Only Method
OL

10
Speed Reference
Set the positioning speed to use after detecting the home signal. The sign is ignored.
The travel direction will depend on the sign of the Home Offset.
OL

40
Creep Speed
Set the speed and the travel direction (sign) to use when starting a zero point return.
OL

42
Home Offset
Set the travel distance from the point where the home signal is detected.
The travel direction will depend on the sign.
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