Bar code tape
Leuze electronic
BPS 8
27
TNT
35/7-2
4
V
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.
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.
Figure 5.5: System arrangement of marker bar code
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.
BCB8
BCB8
BCB8
BCB8
BCB8
A
A
Marker bar code
