Automatic Positioning To Home Position Function - Mitsubishi MR-JE-200A Instruction Manual

4. HOW TO USE THE POINT TABLE

4.4.14 Automatic positioning to home position function

If the home position is fixed by returning to the home position after the power-on, this function enables a
high-speed automatic positioning to the home position. For the absolute position detection system, the home
position return is unnecessary after the power-on.
If the automatic positioning to the home position is executed without completing the home position return,
[AL. 90.1] will occur.
After the power-on, perform the home position return in advance.
Set input devices and parameters as follows.
Home position return mode
selection
Home position return speed
Acceleration time
constant/deceleration time
constant of home position
return
Home position return
direction
Set the home position return speed of the automatic positioning to home position function with [Pr. PT05].
The data of point table No. 1 is used for acceleration/deceleration time constants. Switching on ST2
(Reverse rotation start) enables high-speed automatic return.
Set the rotation direction with home position return direction of [Pr. PT04] when the unit is set to degree.
POINT
The automatic positioning to the home position cannot be performed from
outside the setting range of position data. In this case, perform the home
position return again using the home position return.
Item Device/parameter to be used
MD0 (Operation mode selection 1)
DI0 (Point table No. selection 1) to
DI4 (Point table No. selection 5)
[Pr. PT05]
Point table No. 1
[Pr. PT04]
MD0 (Operation mode selection 1)
Servo motor speed
ST1 (Forward rotation start)
ST2 (Reverse rotation start)
ON
OFF
Acceleration
time constant
Forward rotation
0 r/min
Reverse rotation
ON
OFF
ON
OFF
4 - 68
Setting
Switch on MD0.
Switch off DI0 to DI4.
Set the servo motor speed to travel to the
home position.
The acceleration/deceleration time constant
of point table No. 1 is used.
Set the rotation direction in degrees.
Home position return speed
3 ms or shorter
Home position
5 ms or longer
Deceleration
time constant