Mitsubishi Electric MELSEC Q Series Programming Manual page 402

6 POSITIONING CONTROL
(4) Cautions
(a) Home position return and continuously start of home position return are also
possible in the proximity dog ON in the count method 1.
When the home position return or continuously start of home position return
are executed in the proximity dog ON, the home position return is executed
after return the axis once to position of the proximity dog OFF.
(b) When the zero point is not passed (zero pass signal: M2406+20n ON) until it
travels the distance set in the "travel value after proximity dog ON" from
home position return start, a minor error (error code: 120) will occur, a
deceleration stop is made and home position return does not end normally.
When a distance between home position return start position and home
position is near and a zero point is not passed, select the count method 3.
(c) When the "travel value after proximity dog ON" is less than the deceleration
distance from "home position return speed" to "creep speed", a minor error
(error code: 209) will occur and deceleration stop is made.
(d) If in-position signal (M2402+20n) does not turn ON, home position return is
not ended.
REMARK
The signal types that can be used with home position return by the count method 1
are shown below.
Signal type
DOG signal of Q172DLX
External input signal (DOG) of servo amplifier
(DOG)
Built-in interface in Motion CPU (DI)
Bit device
Ver.! : Refer to Section 1.3 for the software version that supports this function.
Q173DSCPU/
Q172DSCPU
6 - 215
Q173DCPU(-S1)/
Q172DCPU(-S1)
Ver.!
: :
Usable, Unusable