7.2
Motion Command Details
7-23
[ c ] DEC1 + ZERO Signal Method (OW

3C = 2)
z
Operation after Zero Point Return Starts
Travel is started at the zero point return speed in the direction specified in the parameters.
When the rising edge of the DEC1 signal is detected, the speed is reduced to the approach speed.
When the rising edge of the ZERO signal is detected after passing the DEC1 signal at the approach
speed, the speed is reduced to the creep speed and positioning is performed.
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 ZERO signal is detected is set in the Home Offset (OL

42).

If an OT signal is detected during the zero point return operation, an OT alarm will occur.
* 1. The SERVOPACK DEC signal.
* 2. The SERVOPACK EXT1 signal.
* 3. The SERVOPACK P-OT signal.
* 4. The SERVOPACK N-OT signal.
z
Setting Parameters
DEC1 signal
*1
NOT
∗4
POT
∗3
StartZero Point
ZERO signal
*2
Home Offset
(OL42)
Creep Speed
(OL40)
Approach speed
(OL3E)
Zero Point Return Speed
(OL10)
Parameter Name Setting
OW

3C
Home Return Type
2: DEC1 + ZERO Signal Method
OB

093
Home Direction
Set the zero point return direction.
OL

10
Speed Reference
Set the speed to use when starting a zero point return.
Only a positive value can be set; a negative value will result in an error.
OW

18
Speed Override
This parameter allows the Zero Point Return speed to be changed without
changing the Speed Reference (OL

10). Set the speed as a percentage of
the Speed Reference Setting. This setting can be changed during operation.
Setting range: 0 to 32767 (0% to 327.67%) Setting unit: 1 = 0.01%
Example: Setting for 50%: 5000
OL

3E
Approach Speed
Set the speed to use after detecting the DEC1 signal.
Only a positive value can be set; a negative value will result in an error.
OL

40
Creep Speed
Set the speed to use after detecting the ZERO signal after passing the DEC1
signal.
Only a positive value can be set; a negative value will result in an error.
OL

42
Home Offset
Set the travel distance from the point where the ZERO signal is detected
after passing the DEC1 signal.
If the sign is positive, travel will be toward the zero point return direction; if
the sign is negative, travel will be away from the zero point return direction.