Mitsubishi Electric Q172CPU Programming Manual page 498

8 AUXILIARY AND APPLIED FUNCTIONS
Fig. 8.19 Operation for home position shift with the home position return
(2) Setting range of home position shift amount
Set the home position shift amount within the range of from the detected zero
signal to external upper/lower limit switch (FLS/RLS). If the range of external
upper/lower limit switch is exceeded, a major error "external limit switch detection
error" (error codes: 1102, 1103) will occur at that time and the home position return
is not ended.
Setting range of
negative home
position shift amount
Address
decrease
direction
RLS
Proximity dog
Fig. 8.18 Setting range of home position shift amount
(3) Travel speed at the home position shift
When the home position shift function is used, set the travel speed at the home
position shift as the speed set at the home position shift. Either the home position
return speed or creep speed is selected as the travel speed at the home position
shift.
The travel speed at the home position shift for the home position return by
proximity dog type is shown below.
(a) Home position shift operation with the "home position return speed"
Home position
V
return direction
Home position
Home position
return start
Proximity dog
speed
Setting range of
positive home
position shift amount
Address
increase
direction
Home position
return direction
Zero point
Home position
return speed
Home position shift
amount is negative
Zero point
8 - 51
FLS
Home position shift
amount is positive
Home position