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Normas BSI – AENOR
BS EN IEC 61158-3-21:2019 - TC

BS EN IEC 61158-3-21:2019 - TC

Tracked Changes. Industrial communication networks. Fieldbus specifications. Data-link layer service definition. Type 21 elements

2020-02-24 /Definitive
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: lt;br /gt;•Added Network Control Message Type; lt;br /gt;•Miscellaneous editorial corrections.
Industrial, Data circuit-terminating equipment, Data processing, Data transfer, Process control, Automatic control systems, Real-time systems, Local area networks, Computer networks, Data transmission
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