UNE-EN IEC 61158-4-21:2019被替代
Industrial communication networks - Fieldbus specifications - Part 4-21: Data-link layer protocol specification - Type 21 elements (Endorsed by Asociación Espa?ola de Normalización in August of 2019.)
出版：Asociacion Espanola de Normalizacion
专家解读视频
The DLL provides basic time-critical data communications between devices in an automated environment.
EN IEC 61158-4-21:2019 - Identical
IEC 61158-4-21:2019 - Identical
IEC 61158-4-21:2019 - Identical
IEC 61158-4-21:2019 - Identical
EN IEC 61158-4-21:2019 - Identical
