Siemens SIMATIC MV500, Operating Instructions Manual, Page: 46 / 294

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3.2 Code verification
SIMATIC MV500
46
Operating Instructions, 03/2021, C79000-G8976-C494-05
3.2.2 Grading
Quality grades
The verifier reports the marking quality in five grades known as "quality grades".
Older verifiers frequently identify these grades based on a single letter from A to F (without
E). Verifiers of the newer generations evaluate the range numerically from 4 to 0. With the
verifiers of the SIMATIC MV500 series, you can choose either of the quality grading systems in
the WBM user interface.
Evaluation
In addition to this, each quality grade is assigned one of three evaluation levels
(good/adequate/poor) on the readers of the SIMATIC MV500 series. This evaluation not only
allows for rapid visual quality checks using the color coding in the user interface, but also
automatic rejection of the read result as "N_OK" if it falls below a certain quality grade.
Table 3- 1 Quality grades
Quality grades Defaults for quality grading Color identification Defaults for the read result
4 (A) Good Green OK
3 (B) Good (adjustable)
1)
2 (C) Fair (adjustable)
1)
Yellow OK
1 (D) Bad (adjustable)
1)
Red N_OK
(adjustable)
0 (F) Poor
1)
The user-specific setting is only for ascending or descending order.
The levels can be set for the quality of the code as a whole and for individual quality features
separately.
Example
In an application in which only very good markings are acceptable, all grades below 4 are set
to "Poor". This allows the rejection of all unacceptable specimens.
Deactivation of features
It is also possible to deactivate the evaluation of individual quality features, for example,
when these are generally evaluated with a low quality grade due to the conditions of the
application.
Note that by deactivating the quality features the determined code quality no longer fully
meets the definition of the underlying standard. This means a deactivation of the quality
features is not possible for applications that require verification according to a specific ISO
standard.