Home Position Return Retry Function - Mitsubishi Electric Q172CPU Programming Manual

8 AUXILIARY AND APPLIED FUNCTIONS

8.5.13 Home position return retry function

[Data Setting]
[Control details]
Acceleration time Deceleration time
5)
4)
Proximity dog
Fig. 8.15 Operation for home position return retry (proximity dog type)
When a work has been exceeded home position during positioning control, etc., even if
it executes the home position return, depending on the position of work, a work may
not travel to home position direction. In this case, a work is normally travelled before
the proximity dog by the JOG operation, etc, and the home position return is started
again. However, by using the home position return retry function, even if a work is
where, the home position return can be executed.
Refer to Section 8.5.1(5) for home position return method by using the home position
return retry function.
When the "home position return retry function" is used, set the following "home position
return data" using a peripheral devices.
Set the "dwell time at the home position return retry" as required.
Set the parameters for every axis.
Items
Home position return
retry function
Dwell time at the home
position return retry
Operation for the home position return retry function is shown below.
(1) Home position return retry operation setting a work within the range of external
limit switch
Home position
return direction
6)
Home
position
Table 8.3 Home position return data
Setting details
0 : Invalid (Do not execute the home position
return retry by limit switch.)
1 : Valid (Execute the home position return
retry by limit switch.)
The stop time at the deceleration stop during
the home position return retry is set
1) 2)
Home position
return start
3)
External limit switch
Zero point
8 - 45
Setting
Initial value
value
0, 1 0
0 to 5000
0
[ms]
1) It travels to preset direction of
home position return.
2) If the external upper/lower
limit switch turns OFF before
the detection of proximity dog,
a deceleration stop is made.
3) After a deceleration stop, it
travels to reverse direction of
home position return with the
home position return speed.
4) A deceleration stop is made by
the proximity dog OFF.
5) After a deceleration stop, it
travels to direction of home
position return.
6) Home position return ends.