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6. APPLICATION FUNCTIONS
6.22 Home position return request
The home position return request (ZREQ) shows the home position return incomplete status. In the home
position return incomplete status, the home position return request (ZREQ) turns on. When it is necessary to
determine the home position, perform the home position return. When the home position return is completed
properly and the home position is determined, the home position return request (ZREQ) turns off.
(1) Axis status bit
Address (Note) Bit Abbreviation Signal name When tandem drive is being used
1064 0 ISTP Interlock stop Master
1 RMRCH High speed monitor is latched Each axis
2 POV Stop position over-bound Master
3 STO Start up acceptance complete Master
4
Reserved
5
6 ZREQ Home position return request Master
7 Reserved
Note: The address is for the axis 1. For the axis 2 and above, increase in units of C0h for each axis.
Example: Dog method home position return
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
Home position
return speed
Home position return direction
Creep speed
Home position
Z-phase pulse
Start operation (ST)
During operation (OP)
Completion of operation (OPF)
Home position return
request (ZREQ)(Note)
Home position return
complete (ZP)
Proximity dog
Amount of home
position shift
OFF
ON
Note. The home position return request (ZREQ) turns on when a home position return starts.
API LIBRARY
To check if home position return request (ZREQ) is ON/OFF, set
SSC_STSBIT_AX_ZREQ to the status bit number with the
sscGetStatusBitSignalEx or sscWaitStatusBitSignalEx function.