Mitsubishi Electric MELSEC iQ-R16MTCPU Programming Manual page 399

Cautions
• For the axis which executes the home position return by the limit switch combined method, if the external input signal has
not been set in [Motion Control Parameter]  [Axis Setting Parameter]  "External Signal Parameter", a minor error (error
code: 19ECH) will occur and home position return is not executed.
• When the limit switch reverse to home position return direction is turned ON to OFF, deceleration stop is made, home
position return is not completed and a minor error (error code: 1905H, 1907H) will occur.
• Home position return retry function cannot be used in the limit switch combined method.
• If the home position return is executed with the limit switch OFF, it is started to reverse direction of home position return with
creep speed.
• When it does not pass ("[St.1066] Zero pass (R: M32406+32n/Q: M2406+20n)" ON) the zero point from home position
return start to deceleration stop by limit switch OFF, a minor error (error code: 197AH) will occur, a deceleration stop is
made and home position return does not end normally. However, when "1: Not need to pass motor Z phase after the power
supply is switched on" is selected in the "function selection C-4 (PC17)" of servo parameter (expansion setting parameter),
if the zero point is not passed until from home position return start to deceleration stop by limit switch OFF, the home
position return can be executed.
• Deceleration stop is executed after the limit switch OFF. Set the limit switch in expectation of deceleration distance.
• If the "[St.1062] In-position (R: M32402+32n/Q: M2402+20n)" is turned ON, home position return is not ended.
• When the width is in a zero point, the home position differs from the home position return by the proximity dog method 1,
proximity dog method 2, count method 1, count method 3, dog cradle method and scale home position signal detection
method.
5 POSITIONING CONTROL
5.21 Home Position Return
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