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Overview IEC 61158-5-21:2019 is an international standard developed by the International Electrotechnical Commission (IEC) that defines the application layer service for Type 21 fieldbus systems in i…
Overview IEC 61158-5-21:2010 defines the Application Layer service model for the Type 21 fieldbus protocol within the IEC 61158 family. It specifies the structure and externally visible services of t…
