Image processing
3.2 Code verification
SIMATIC MV500
Operating Instructions, 06/2018, C79000-G8976-C494-01
41
Marking quality
To recognize and ensure the readability and quality of a marking, a verifier is required
instead of a pure optical reader. A pure optical reader (without verifier) outputs only the
"read/not read" result. This means the optical reader does not provide any trend data to the
marking device.
Figure 3-2
Course of marking quality when using a reader without a verifier
The verifier, in contrast, assigns a quality grade from 4 to 0 to the readable marking. These
levels provide information to the marking device to detect when preventive maintenance is
required. Based on this knowledge, maintenance can be planned at a suitable time before
the device actually becomes defective.
Figure 3-3
Sequence involved in marking quality when using a verifier
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.
Содержание SIMATIC MV540 H
Страница 24: ...Description 1 7 Functional description SIMATIC MV500 24 Operating Instructions 06 2018 C79000 G8976 C494 01 ...
Страница 194: ...Service and maintenance 10 3 Replacing a module SIMATIC MV500 194 Operating Instructions 06 2018 C79000 G8976 C494 01 ...
Страница 232: ...Appendix A 3 Alternative user interfaces SIMATIC MV500 232 Operating Instructions 06 2018 C79000 G8976 C494 01 ...
Страница 236: ...List of abbreviations SIMATIC MV500 236 Operating Instructions 06 2018 C79000 G8976 C494 01 ...
Страница 238: ...Service Support SIMATIC MV500 238 Operating Instructions 06 2018 C79000 G8976 C494 01 ...