8 Motion Commands
8-28
(m) INPUT Only Method
Travel is started at the creep speed in the direction specified by the sign of the creep speed. When the rising
edge of the INPUT signal is detected, positioning is performed at the positioning speed. When positioning
has been completed, a machine coordinate system is established with the final position as the zero point.
The moving amount after the INPUT signal is detected is set in the Home Offset. The positioning speed is set
in the Speed Reference. If an OT signal is detected during creep speed operation, an OT alarm will not occur,
the direction will be reversed, and a search will be made for the INPUT signal. If an OT signal is detected
during positioning speed operation, an OT alarm will occur.
The INPUT signal is allocated to the motion setting parameter OB
05B, allowing the zero point return
operation to be performed without actually wiring a signal. This method can thus be used to temporarily set
the zero point during trial operation.
Detecting the rising edge of the INPUT signal is performed using software processing. The position where
positioning is completed will vary with the high-speed scan setting, positioning speed, etc. Do not use this
method if repeat accuracy is required in the position where the zero point return operation is completed.
* 1. The SERVOPACK P-OT signal.
* 2. The SERVOPACK N-OT signal.
Note: The stopping method when the OT signal is detected depends on the setting of
SERVOPACK parameters.
INPUT signal (OB
05B)
Start
Zero Point
Creep Speed
(OL
40)
Home Offset
(OL
42)
Positioning Speed
(OL
10)
INPUT signal (OB
05B)
Start
Zero Point
Creep Speed
(OL
40)
Home Offset
(OL
42)
Positioning Speed
(OL
10)
Creep Speed
(OL
40)
NOT
*2
POT
*1
NOT
*2
POT
*1
Parameter
Name
Setting
OW
3C
Home Return Type
19: INPUT Only Method
OL
10
Speed Reference
Set the positioning speed to use after detecting the INPUT signal. The
sign is ignored. The travel direction will depend on the sign of the
Home Offset.
OL
40
Creep Speed
Set the speed to use when starting a zero point return. The travel
direction will depend on the sign of the creep speed.
OL
42
Home Offset
Set the distance to travel from the point the INPUT signal is detected.
The travel direction will depend on the sign.
OB
05B
INPUT Signal for Zero
Point Return
This signal must be set to 1 from the ladder program.