Microscan Quadrus EZ Bedienungsanleitung PDF herunterladen (Seite 334)

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A-30 Quadrus EZ Reader User’s Manual

Object Detector

Appendix L — Object Detector

In a typical operation, a reader will wait for symbol data only during a triggered read cycle.

A read cycle is initiated by a “trigger” and can be in the form of a serial command from the

host (internal trigger) or a signal from an object detector (external trigger).

When an object detector (also called a sensor, package detector, etc.) is used, it is set up

so that its beam will bounce off the approaching object and the resulting pulse will be sent

to the reader to begin the read cycle. Typically, a detector is positioned so that it will detect

the presence of an object before its symbol can be read.

An object detector is mounted in almost any position relative to the object as long as (1)

the object passes within range of the detector and (2) direct or reflected light from the

detector does not interfere with the reader’s reception.

As the item continues to move down the line, its symbol moves into the reader beam and

is read by the reader.

Object Detector Operation

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