Reading Multiple Codes In The Image - Siemens SIMATIC MV550 S Operating Instructions Manual

● Code and background must have a homogeneous brightness.
● The following limit values for the bar width must not be exceeded:
– Code 39: 8 pixels
– Code128: 12 pixels
– Int. 2/5: 5 pixels
– EAN 13/UPC-A/UPC-E/EAN 8: 12 pixels
– Code 93: 14 pixels
– Codabar: 9 pixels
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 remains 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.
SIMATIC MV500
Operating Instructions, 05/2019, C79000-G8976-C494-02
Image processing
3.1 Code reading (1D/2D codes)
39