Mitsubishi Electric MELSEC Q Series Programming Manual page 433

6 POSITIONING CONTROL
[Cautions]
Be sure to set the external limit switch (FLS, RLS) in the upper/lower position of machines. If
the home position return retry function is used without external limit switch, servo motors
continue rotating.
(1) Valid/invalid of home position return retry function by the home position return
method is shown below.
Home position return methods
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
Driver home position return method
(2) Make a system for which does not execute the servo amplifier power off or servo
OFF by the external upper/lower limit switch. Home position return retry cannot be
executed only in the state of servo ON.
(3) Deceleration is made by detection of the external limit switch and travel to reverse
direction of home position return is started. In this case, a major error (error codes:
1001, 1002, 1101, 1102) will not occur.
Valid/invalid of home position return retry
Operation A
Operation B
Operation C
CAUTION
6 - 246
function
: Valid, : Invalid