Bar code tape
Leuze electronic BPS 8 23
TNT 35/7-24V
5.2 Control bar codes
With the help of control bar codes that are affixed on top of the bar code tape at appropriate
positions, functions in the BPS can be activated or deactivated, e.g. precise, reproducible
switching between different BCB value ranges at switches.
Code type Code128 with character set B is used for the control bar code.
The MVS label is a control bar code for the precise, reproducible switching of position values
from a preceding to a subsequent bar code tape. The subsequent bar code tape begins with
another, new value range.
The changeover between the different value ranges of the two BCBs occurs independent of
the direction of travel in the center of the MVS control bar code.
If, upon reaching the the center of the MVS control bar code, the BPS 8 does not detect the
value range of the subsequent BCB in the scanning beam, the position value of the first BCB
section is still output for half of the label width starting from the center of the MVS control bar
code.
Arrangement of the control bar codes
The control bar code is attached in such a way that it replaces one position bar code or
seamlessly connects two bar code tapes with different value ranges to one another ((see
figure 5.2)).
Figure 5.2: Arrangement of the MVS control bar code
NOTE
Distance between two control bar codes!
Make certain that there is only one control bar code (or marker bar code) in the scan-
ning beam at a time.
The minimum distance between two control bar codes is determined by the distance
between the BPS 8 and bar code tape and the resulting length of the scanning beam.
A
B
A Control bar code
B The control bar code is decoded in the marked scans
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