Reading Multiple Codes In The Image - Siemens SIMATIC MV500 Operating Instructions Manual

Range of applications for "low" codes
For special applications in the printing industry, optimization is available for 1D codes with
extremely low bar heights. It can be enabled in the Decoder options ("Program > Decoder
step > Decoder options") .
The range of applications for 1D codes is to be limited with the following constraints:
• Height must be > 20 pixels.
• Height > 2x minimum width (1x width).
• The codes must be parallel to the axis (horizontal or vertical): Tolerance < ±5°.
• The print quality must be extremely good.
• The minimum quiet zone length must be > 5.5x the minimum width (1x width).
3.1.3

Reading multiple codes in the image

Note
Restricted availability of multicode
Multicode functionality is not available for:
• QR codes
• DotCodes
• PDF417 codes
Note
Order of output
Output is line by line starting with the code of the top left and finishing at the bottom right.
If the order of the codes is required for an application, make sure that the position and
rotation of the marked object remain constant during every image acquisition.
Up to 50 codes per image acquisition can be decoded using the "Multicode" parameter.
SIMATIC MV500 U/X can decode up to 150 codes per image acquisition.
Range of application
• Different code types can also be read in one image.
• Available for data matrix codes that can be read with standard methods.
• The maximum number of codes and the code types used are specified when the program
is saved. Depending on the configuration, the actual number and the code types found in
processing mode can vary.
• Due to the multiple decoding, the processing time is extended approximately proportional
to the number of codes per image.
SIMATIC MV500
Operating Instructions, 03/2021, C79000-G8976-C494-05
Image processing
3.1 Code reading (1D/2D codes)
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