Device description
Leuze electronic
BPS 307i
24
• When the control label is passed, the new BCB value is output relative to the middle of the device or
label.
1
Scanning beam
2
Middle of the control bar code
3
Middle of the BPS
4
Direction of movement
Figure 3.13: Changeover position with
MVS
control bar code for BCB changeover
3.4.3 Marker labels
Marker labels, which are affixed at the appropriate locations on top of the bar code tape, can be used to
trigger various functions in the superior control. The BPS detects the defined marker labels in the scanning
beam, decodes them, and makes them available to the control.
Definition of the marker label
The following combinations of letters and numbers may be used as marker labels:
First character: A … Z, a … z
Second character: Digit from 0 … 9
Third character: Digit from 0 … 9
Structure of the marker labels
Code type Code128 with character set B is used for the marker labels.
Arrangement when using the marker label with positioning
The marker label must be attached to the bar code tape aligned with the grid of the actual coding. A posi
-
tion code should be visible before and after the marker label.
If the BPS does not detect the new BCB section upon reaching the changeover position, the posi
-
tion-value output is dependent on the used control bar code.
MVS
control bar code: The position value of the first BCB is output beyond the middle of the
MVS
label for half of the label width.
MV0
control bar code: No position values are output after the middle of the
MV0
label.
000040
000044
000048
0150000
015004
1
2
3
4
NOTICE
Distance between two marker labels!
Make certain that there is only one marker label (or control bar code) in the scanning beam at a time.
The minimum distance between two marker labels is determined by the distance between the BPS and
bar code tape and the resulting length of the scanning beam.
