Basic Requirements; Using The Verification - Siemens SIMATIC MV500 Operating Instructions Manual

Image processing
3.2 Code verification
9. Enter the values for contrast and maximum reflectance specified on the calibration card for
the selected code in the appropriate boxes.
10.Start the calibration and, if necessary, follow the instructions for eliminating errors.
3.2.4.2

Basic requirements

Recommended cell sizes for verification of 2D codes
The following basic requirements must be met to ensure a reliable verification:
• Recommended cell size calibration code:
10 pixels (min. 5 pixels)
• Recommended cell size target code:
10 pixels (min. 5 pixels)
• Recommended quiet zone:
Double cell height all around the code in the image
If the target code differs significantly from the available calibration codes in terms of its cell
size, you must make sure to select a sufficiently high resolution when you select the camera
model.
3.2.4.3

Using the verification

Once calibration is completed, it can be saved on the reader and applied. To this end, open or
create a program and the select the saved calibration as reference in the program step "Image
acquisition".
The verification standard selected for the calibration is then applied in all decoder steps and
for all code types that support this standard.
Note
Uncalibrated verification
When you select the "Uncalibrated" verification reference, depending on the selection in the
advanced settings of the decoder step, data matrix codes are evaluated according to
ISO/IEC 16022 or ISO/IEC 29158 and barcodes are evaluated according to ISO/IEC 15416. The
evaluation is, however, made without any basic calibration. The standard report corresponds
to the ISO/IEC 16022 "Standard" decoder (Page 68) or Standard report for ISO/IEC 29158
(Page 70) for data matrix codes or the Standard report for ISO/IEC 15416 (Page 73) for
verifiable barcodes.
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Operating Instructions, 03/2021, C79000-G8976-C494-05
SIMATIC MV500