SICK ICR 84x, Руководство по эксплуатации

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Chapter 4 Operating instructions
ICR 84x Image Code Reader
4-6
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SICK AG · Division Auto Ident · Germany · All rights reserved 8 010 961/0000/10-05-2005
Installation
Preventing surface reflections
The ICR can be installed parallel to the object surface.
4.2.7 Count direction of the code position CP
Explanation The ICR can scan and decode several codes with each read.
In doing so, it determines the local reading diagnosis data for each code in the image
memory.
Fig. 4-7 shows the count direction of the code position along the reading window.
By determining the value, the device can separate identical codes (code type, code length,
and data content) and assign the code data in the reading result to its position on the object.
For 2-D codes , the ICR determines the spatial position of the finder patterns in the image
memory. It outputs its corner points in the shape of two-dimensional coordinates in the
reading result of the auxiliary interface as the “PT“ reading diagnosis data (see “1. Output of
reading result: 2-D code (DataMatrix ECC 200)“ , Page 6-30 ).
For bar codes , the ICR determines the position of the first dark line of the start character in
the image memory. It outputs the value in the reading result of the auxiliary interface as
reading diagnosis data “CP“ (see “2. Output of reading result: Bar code“, Page 6-32 ).
When the ICR 840 is in the focus position (reading distance 80 mm ((3.15 in)), one pixel in
the image memory is approx. 33
µ
, whereby 1% of the CP is approx. 0.4 mm lengthwise of
the reading area.
Fig. 4-6:
Installing the ICR parallel to the object surface
ICR with front reading window ICR with side reading window
(Top view) (Side view)
Fig. 4-7: Count direction of the code position CP for bar codes along the reading window
100 %
0 %
CP
100 %
0 %
CP