Siemens SIMATIC Vision Sensor VS 130-2 Manual page 24

Product Overview
Requirements for QR codes for fast reading with guaranteed read rates up to
5 Hz (for all sensor heads except 6GF2002-8GB)
•
The code dimension must not exceed 37 x 37.
•
To allow the code to be found quickly, there must be no other objects (bus
structures count here as well) in the image with enclosed rectangle and of a
comparable size to the trained code.
•
The code must be positioned in the sensor image so that there is always a
clearance of at least 3 dots to the edge of the image.
•
The code should not make contact with any other objects in the image (keep
the quiet zone free: 4 dots).
•
The dots of the code must have a minimum size of 10 pixels.
•
The view angle of the sensor to the printed surface must be approaching
vertical (80 to 90 °).
•
The code must not be mirrored compared with the trained code.
•
The polarity must be the same as in the trained code.
•
The code must have the same dimension as the trained code.
Characteristics of QR code
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Any alignment of the code in the image
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Up to 5 code readings per second
•
Reading inverted code images
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Calculation of quality characteristics according to the AIM specification
•
Display of the surrounding rectangle around the code position and code mid
point
•
Display of the roll angle and tilt angle
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Vision Sensor SIMATIC VS 130-2/VS 130-2vcr
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