Marker Bar Codes - Leuze electronic BPS 8 Original Operating Instructions

Bar code positioning system

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5.3

Marker bar codes

Marker bar codes, which are affixed at the appropriate locations via a position bar code, can

be used to trigger various functions in the superior control. The BPS 8 detects the defined

marker bar codes in the scanning beam, decodes them, and makes them available to the

control.

NOTE

Distance between two marker bar codes!

 Make certain that there is only one marker bar code (or control bar code) in the scan-

ning beam at a time.

The minimum distance between two marker bar codes is determined by the distance

between the BPS 8 and bar code tape and the resulting length of the scanning beam.

Definition of the marker bar code

The following combinations of letters and numbers may be used as marker bar codes:

• First character: Capital letter A, B, C, D or Z

• Second character: Digit from 0 ... 9

• Third character: Digit from 0 ... 9

Structure of the marker bar codes

Code type Code128 with character set B is used for the marker bar code.

Arrangement for using the marker bar code with position bar codes

The marker bar code must be attached to the bar code tape aligned with the grid of the

actual coding. A position bar code should be detected by the scanning beam before and

after the marker bar code.

BCB8

A Marker bar code

Figure 5.5: System arrangement of marker bar code

Leuze electronic

BCB8

BPS 8

Bar code tape

BCB8

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