XPS Unified Programmer’s Manual
7.2.1.77 GroupHomeSearch
Name
GroupHomeSearch - Initiates a home search.
Input tests
- Refer to section 7.1: “Input Tests Common to all XPS Functions”.
- The actor must be a valid group name: (-19)
- Group status must be "Not referenced”: (-22)
Description
This function initiates a home search for each positioner of the selected group.
The group must be initialized and in “NOT REFERENCED” state otherwise error (-22)
is returned .
The home search can fail due to:
• a following error: (-25).
• a ZM detection error: (-49).
• a motion done time out, when a dynamic error of the positioner is detected during
home search process (-33).
• a home search timeout, when the complete (and complex) home search procedure
was not executed in the allowed time: (-28).
For all these errors, the group returns to “NOTINIT” state.
After the home search sequence, each positioner error is checked. If an error is detected,
the hardware status register is reset (motor on) and the positioner error is cleared before
checking it again. If a positioner error is always present, (-35) error is returned and the
group becomes “NOTINIT”.
Once the home search is successful, the group is in “READY” state.
NOTES
The home search routine for each positioner is defined in “stages.ini” file by
“HomeSearchSequenceType” parameter.
The homesearch time out is defined in “stages.ini” file by “HomeSearchTimeOut”
parameter.
The home search sequence is defined in “system.ini” file by
“InitializationAndHomeSearchSequence” parameter for each group with several
positioners.
XY group
The home search sequence can be “Together”, “XthenY” or “YthenX” in a
standard XY configuration.
If the XY group is “Gantry” (dual positioner on X or on Y axis) only “XthenY” or
“YthenX” are allowed.
XYZ group
The home search sequence can be “Together” or “XthenYthenZ”.
MultipleAxes group
The home search sequence can be “Together”, “OneAfterAnother” or
“OneAfterAnotherInReverseOrder”.
125 EDH0373En1023 — 01/18
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