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The only way to get the quality is via Siemens Industry Online Support (SIOS) or the Siemens Digital Enterprise Portal .

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Later versions (V16, V17, V18, V19) often introduce cutting-edge features but can come with "teething problems." V15.1 SP2 is the result of years of patches. It is the of PLC software—not the newest, but arguably the most reliable. The only way to get the quality is

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