Hills NVC-BM1 User Manual page 65

And you can select the directions as A<->B, A ->B, and B->A.
A<->B: Only the arrow on the B side shows; when an object going across the plane
with both direction can be detected and alarms are triggered.
A->B: Only the object crossing the virtual plane from the A side to the B side can be
detected.
B->A: Only the object crossing the virtual plane from the B side to the A side can be
detected.
4. Set the sensitivity [1~100].
5. Choose another virtual plane on the dropdown list to configure. Up to 4 virtual
planes are configurable.
6. Click Save to save the settings.
Figure 5-48 Draw Virtual Plane
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