IEC 61158-6-21 : 1.0已作废
INDUSTRIAL COMMUNICATION NETWORKS - FIELDBUS SPECIFICATIONS - PART 6-21: APPLICATION LAYER PROTOCOL SPECIFICATION - TYPE 21 ELEMENTS
出版：International Electrotechnical Committee
专家解读视频
Offers common elements for basic time-critical and non-time-critical messaging communications between application programs in an automation environment, as well as material specific to Type 21.
BS EN 61158-6-21 : 2012 - Identical
CEI EN 61158-6-21 : 2013 - Identical
NBN EN 61158-6-21 : 2012 - Identical
BS EN IEC 61158-6-21:2019 - Identical
NEN-EN-IEC 61158-6-21:2019 - Identical
NEN EN IEC 61158-6-21 : 2012 - Identical
I.S. EN IEC 61158-6-21:2019 - Identical
DS EN 61158-6-21 : 2012 - Identical
DS/EN IEC 61158-6-21:2019 - Identical
EN IEC 61158-6-21:2019 - Identical
PN EN 61158-6-21 : 2012 - Identical
DIN EN 61158-6-21 : 2013 - Identical
