Yaskawa MP920 User's Manual Design - Manual (Page 140)

4 Motion Control
4.2.5 Zero Return Mode
4-26
Operating Conditions
Input a limit switch signal width at least twice that of the high-speed scan setting.
Ladder Logic Program Example
Fig. 4.12 RUN Commands (DWG H01)
The example in the above illustration has been greatly simplified. In actual operation, each
register can be controlled from the user program.
Set the zero return mode to ON.
IB00100: Limit switch signal (DECLS)
When IB00110 turns ON, the zero point
return operation starts. When the zero
point return operation is completed, the
zero point return completion signal
IBC0C0F (ZRNC) turns ON.
H0110
RUNMOD
OWC0C0
LSDEC
OBC0C1F
IB00100
RUN
OBC0C10
RUNPB
IB00110
DEND
Driver RUN command (RUN)