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Overview IEC 61158-3-21:2019 is part of the IEC 61158 fieldbus series and specifies, in an abstract and implementation‑independent way, the externally visible data-link layer service for Type 21 fiel…
Overview IEC 61158-3-21:2010 is part of the IEC 61158 series of fieldbus specifications and defines the data‑link layer (DLL) service for Type 21 fieldbus elements. The standard describes, in an abst…