Panasonic LightPix AE20 User Manual page 67

Conditions under which measuring results are judged as OK
If the detected edge meets the inspection results and following two conditions, it is judged as OK.
The edge in the edge direction (X or Y) for which a teaching was executed must be detected.
Detection edge distance does not exceed the edge distance for which a teaching was executed +/-
allowable range set in JUDGEMENT CRITERIA SETTING mode.
Example:
Teaching and Setting Judgement Criteria
OK Judgement
NG Judgement
Cannot detect any edge.
60
Out of range Cannot detect any edge in the
direction for which a teaching
was executed.