IEC 61158-3-19:2010 defines in an abstract way the externally visible service provided by the Type 19 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. This second edition cancels and replaces the first edition published in 2007 and constitutes a technical revision. The main changes with respect to the previous edition are:- increasing the number of supported devices (511 instead of 254);- introducing a communication version identification;- adding a mechanism for remote address allocation;- introducing enhanced parameter addressing (32 bit instead of 16 bit);- restructuring control and status word;- improving the redundancy and hotplug features;- improving the error handling;- adding a multiplexing protocol (SMP: Type 19 Messaging Protocol).This bilingual version published in 2012-01 corresponds to the English version published in 2010-08.
IEC 61158-3-19:2007 It 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. It includes the following significant changes with respect to the previous edition deletion of the former Type 6 fieldbus, and the placeholder for a Type 5 fieldbus data-link layer, for lack of market relevance; addition of new types of fieldbuses; division of this part into multiple parts numbered.
IEC 61158-3-19:2014 defines the services provided to the Type 19 fieldbus application layer at the boundary between the application and data-link layers of the fieldbus reference model and systems management at the boundary between the data-link layer and systems management of the fieldbus reference model. This third edition cancels and replaces the second edition published in 2010. It constitutes a technical revision. The main changes are: - introducing connections based on a producer-consumer model; - introducing additional mechanisms to realize features such as timestamping and oversampling; - improving the hotplug and redundancy features; - improving the phase switching and the error handling; - editorial improvements.
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