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Image processing
3.2 Code verification
Figure 3-3
However, it is important that the measuring procedure and marking quality are suitable for
the marking method used. Depending on the particular requirements, there are several test
standards. Data matrix codes on labels can be tested with test systems according to
ISO/IEC 16022. For directly marked parts, however, a verification tailored to this purpose is
necessary.
With direct part marking (DPM), the data matrix code is applied directly to the surface of the
object. Here, other marking errors occur that make it necessary to use verification specially
designed for this purpose.
The verifiers of the SIMATIC MV500 series support several verification standards for a wide
range of applications and marking processes. In contrast to the standards for DPM
verification, traditional standards can lead to false alarms or to serious marking errors being
overlooked.
3.2.2
Grading
Quality levels
The verifier reports the marking quality in five grades known as "quality levels".
Older verifiers identify these grades based on a single letter A to F (without E) with F being
the lowest quality level. Verifiers of the newer generations identify the value range
numerically from 4 to 0 with 0 being the lowest quality level.
With the verifiers of the SIMATIC MV500 series, you can choose either of the quality grading
systems.
42
Sequence involved in marking quality when using a verifier
Operating Instructions, 05/2019, C79000-G8976-C494-02
SIMATIC MV500
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