IEC 61158-3-21:2019现行
Industrial communication networks - Fieldbus specifications - Part 3-21: Data-link layer service definition - Type 21 elements
出版：
专家解读视频
IEC 61158-3-21:2019 defines in an abstract way the externally visible service provided by the Type 21 fieldbus data-link layer in terms of the primitive actions and events of the service; the parameters associated with each primitive action and event, and the form which they take and the interrelationship between these actions and events, and their valid sequences. It cancels and replaces the first edition published in 2010 and constitutes a technical revision. The main changes are listed below:?Added Network Control Message Type;?Miscellaneous editorial corrections.
DIN EN IEC 61158-3-21:2020-06 - Identical
OVE EN IEC 61158-3-21:2020 07 01 - Identical
UNE-EN IEC 61158-3-21:2019 - Identical
NEN EN IEC 61158-3-21 : 2019 en - Identical
EN IEC 61158-3-21:2019 - Identical
BS EN IEC 61158-3-21:2019 - Identical
I.S. EN IEC 61158-3-21:2019 - Identical
PN-EN IEC 61158-3-21:2019-12 - Identical
CEI EN IEC 61158-3-21:2019 - Identical
UNE-EN 61158-3-21:2012 - Identical
NF EN IEC 61158-3-21:2019 - Identical
