Home Position Return Retry Function - Mitsubishi Electric MELSEC iQ-R16MTCPU Programming Manual

Home position return retry function

When a current value has been exceeded home position during positioning control, etc., even if it executes the home position
return, depending on the position of current value, a current value may not travel to home position direction. In this case, a
current value 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, the home position return can be executed regardless of
current value position.
Refer to the following for home position return method by using the home position return retry function. (Page 187 Setting
items for home position return data)
Setting data
When the "home position return retry function" is used, set the following "home position return data" using MT Developer2.
Set the "dwell time at the home position return retry" as required.
Set the parameters for every axis.
■Home position return data
Items
Home position return retry function
Dwell time at the home position return retry
Processing details
Operation for the home position return retry function is shown below.
■Home position return retry operation setting a current value within the range of external limit
switch
Acceleration time º Deceleration time
(5)
(4)
Proximity dog
5 POSITIONING CONTROL
406
5.21 Home Position Return
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.
Home position
return direction
(1)
(6)
Home Home position
position return start
(3)
Zero point
(1) It travels to preset direction of
home position return.
(2)
If the external upper/lower
(2)
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
External limit switch
travels to direction of home
position return.
(6) Home position return ends.
Setting value Initial value
0, 1 0
0 to 5000 [ms] 0