Rockwell Automation Publication MOTION-UM003K-EN-P - January 2019 257
Homing Chapter 12
Passive Homing
When the axis Homing mode is configured as Passive, the MAH instruction
redefines the actual position of a physical axis on the next occurrence of the
encoder marker or home sensor. The sequence determines the homing steps.
You must set the homing sequence to marker or switch. Passive homing is most
commonly used to calibrate Feedback Only axes to their markers or switch.
Passive homing is identical to active homing to an encoder marker or switch
except that the motion controller does not command any axis motion.
After initiating passive homing (MAH), the axis must be moved past the
encoder marker or trip the home switch for the homing sequence to complete
properly. In this case, you must set the homing sequence to marker or switch.
The motion controller cannot directly command motion for physical Feedback
Only axes and must be accomplished via other means.
For closed-loop Servo axes, when configured for Passive Homing, only set the
Sequence to Immediate. Then when the MAH is executed, it simply sets the
actual position to that of the Position value set in the Homing parameters.
There is no physical motion with these settings.
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