SICK CLV 45 Series, Руководство по эксплуатации

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Chapter 10 Operating Instructions
CLV 45x Bar Code Scanner
10-38
© SICK AG · Division Auto Ident · Germany · All rights reserved 8 009 139/K949/06-06-2002
Appendix
10.7.3 Calculating the necessary distance if several bar codes are read on each
object
Fig. 10-25: Required distance between the bar codes on an object
A B C D E A B C D E
A B C D E A B C D E
dx
dx
dy
SMART Decoder:
for bar codes with identical code type and identical or different data contents.
Distance dx: min. 60 x module width
e. g. 30 mm for module width 0.5 mm
Distance dy: 10 x d
scan
where d
scan
= vertical distance between two consecutive scan lines
e. g. scan line 90
°
to bar code, scanning frequency 800 Hz, v = 2 m/s
V 2000 mm/s
d
scan
=
____
d
scan
=
_________________
= 2.5
f 800 /s
dy = 10 x 2.5 mm = 25 mm
Standard Decoder:
The above distances are also required for reading bar codes with identical names (identi-
cal data content and code types).
Prerequisite for separating bar codes with identical names:
1. The C
ODE DISTANCE
between the bar codes must be parameterized correctly
(D
EVICE CONFIGURATION
tab, E
DIT TRACKING PARAMETERS
button)
2. The code position comparison must be activated
(C
ODE CONFIGURATION
tab, under C
ODE POSITION
)
Bar code lines in conveyor direction:
If the scan line is to detect bar codes of the same name with the same code position, the
travel information must be supplied by an external incremental sensor so that the bar
codes can be distinguished from one another.
Rule of thumb: the blank zone should surround the bar code completely!