Leuze BPS 307i - Page 22

Device description
Leuze electronic GmbH + Co. KG BPS 307i 22
NOTICE
1m difference in the bar code position values for correct measurement value switching!
Ä For different BCB value ranges, make certain that the position value has a value distance of
minimum 1m between the preceding position bar code (before the control bar code) and the
subsequent position bar code (after the control bar code).
If the minimum distance between the barcode values is not maintained, position determina-
tion may be faulty.
ð Example (BCB with 40mm grid): If the last position barcode on the BCB before the control
barcode is 75120, the following position barcode on the BCB after the control barcode
must be at least 75220.
• The end of the preceding bar code tape and the start of the subsequent bar code tape can end and be-
gin, respectively, with completely different position bar codes.
• Position value changeover by means of a control bar code always occurs at the same position, i.e., it
serves to change from the preceding tape to the subsequent tape and vice versa.
• If the center of the BPS reaches the transition point of the control barcode, the device switches to the
second BCB, provided the next position label is in the BPS's scanning beam.
The output position value is thereby always uniquely assigned to one BCB.
NOTICE
If the BPS does not detect the new BCB section upon reaching the changeover position, the po-
sition-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.
• When the control label is passed, the new BCB value is output relative to the middle of the device or la-
bel.
000040 000044 000048 0150000 015004
1
2
3
4
G40Leuze G40Leuze G40Leuze G40Leuze G40Leuze
1 Scanning beam
2 Control bar code center
3 Middle of the BPS
4 Direction of movement
Fig.3.13: Changeover position with MVS control bar code for BCB changeover