This part of IEC 61158 provides common elements for basic time-critical messaging
communications between devices in an automation environment. The term “time-critical” is
used to represent the presence of a time-window, within which one or more specified actions
are required to be completed with some defined level of certainty. Failure to complete specified
actions within the time window risks failure of the applications requesting the actions, with
attendant risk to equipment, plant and possibly human life.
This standard defines in an abstract way the externally visible service provided by the Type 12
fieldbus data-link layer in terms of
a) the primitive actions and events of the service;
b) the parameters associated with each primitive action and event, and the form which they
take;
c) the interrelationship between these actions and events, and their valid sequences.
The purpose of this standard is to define the services provided to
? the Type 12 fieldbus application layer at the boundary between the application and data-link
layers of the fieldbus reference model;
? systems management at the boundary between the data-link layer and systems
management of the fieldbus reference model.
IEC 61158-3-12:2010 history
2019IEC 61158-3-12:2019 Industrial communication networks - Fieldbus specifications - Part 3-12: Data-link layer service definition - Type 12 elements
2014IEC 61158-3-12:2014 Industrial communication networks - Fieldbus specifications - Part 3-12: Data link layer service definition - Type 12 elements
2010IEC 61158-3-12:2010 Industrial communication networks - Fieldbus specifications - Part 3-12: Data link layer service definition - Type 12 elements
2007IEC 61158-3-12:2007 Industrial communication networks - Fieldbus specifications - Part 3-12: Data-link layer service definition - Type 12 elements