Mitsubishi Electric MELSEC-Q Series - Page 390

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6 POSITIONING CONTROL
(2) Home position return retry function/dwell time at the home position
return retry
(a) Valid/invalid of home position return retry is set.
(b) When the valid of home position return retry function is set, the time to stop
at return of travel direction is set with dwell time at the home position return
retry.
(c) Operation for the proximity dog method home position return by setting
"valid" for home position return retry function is shown below.
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,
the temporary stop is
made during time set in
the "dwell time at the
home position return retry"
and 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,
the temporary stop is
made during time set in
the "dwell time at the
home position return retry"
and it travels to direction
of home position return.
6) Home position return
ends.
Acceleration time Deceleration time
Home position
return direction
Home position
return start
Home
position
The temporary stop is made during time
set in the "dwell time at the home
position return retry".
External limit switch
Zero point
Proximity
dog
6)
5)
1) 2)
3)
4)
The temporary stop is made during time
set in the "dwell time at the home
position return retry".
Fig. 6.31 Operation for home position return retry function
(d) Valid/invalid of home position return retry function by the home position
return method is shown below.
Home position return methods
Valid/invalid of home position return retry
function
Proximity dog method
Count method
Data set method
Dog cradle method
Stopper method
Limit switch combined method
Scale home position signal
detection method
Dogless home
position signal
reference method
Operation A
Operation B
Operation C
Driver home position return method
: Valid, : Invalid