IEC PAS 62406-2005 pdf – Real-time Ethernet TCnet (Time-Critical Control Network)

IEC PAS 62406-2005 pdf – Real-time Ethernet TCnet (Time-Critical Control Network).
This PAS addresses the essential part of the RTE-TCnet profile, which are the extension part of ISO/IEC 8802-3 based Data Link layer and the Application layer exploiting the services of the Data Link layer immediately below. This PAS describes the specifications essential for RTE-TCnet profile, specifically on the Data Link layer and the Application layer, in terms of the “three-layer” Fieldbus Reference Model which is based in part on the OSI Basic Reference Model. Other part of RTE-TCnet profile is not in the scope of this PAS. 1.2 Nomenclature for references within this PAS Clauses, including annexes, can be referenced in their entirety, including any subordinate subclauses, as “Clause N” or “Annex N”, where N is the number of the clause or letter of the annex. Subclauses can be referenced in their entirety, including any subordinate subclauses, as “N.M” or “N.M.P” and so forth, depending on the level of the subclause, where N is the number of the subclause or letter of the annex, and M, P and so forth represent the successive levels of subclause up to and including the subclause of interest. When a clause or subclause contains one or more subordinate subclauses, the text between the clause or subclause heading and its first subordinate subclause can be referenced in its entirety as “N.0” or “N.M.0” or “N.M.P.0” and so forth, where N, M and P are as above. Stated differently, a reference ending with “.0” designates the text and figures between a clause or subclause header and its first subordinate subclause. 2 Scope 2.1 Field of applications In industrial control systems, several kinds of field devices such as Drives, Sensors and Actuators, Programmable controllers, Distributed Control Systems and Human Machine Interface devices are required to be connected with control networks.
Plant production may be compromised due to errors, which could be introduced to the control system if the network does not provide a time-critical response. Therefore the following characteristics are required for a time-critical control network. A deterministic response time between the control device nodes Ability to share process data seamlessly across the control system RTE-TCnet is applicable to such industrial automation environment, in which time-critical communications is primarily required. 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.
3 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 61158-3:2003, Digital data communications for measurement and control – Fieldbus for use in industrial control systems – Part 3: Data link service definition IEC 61158-4:2003 3, Digital data communications for measurement and control – Fieldbus for use in industrial control systems – Part 4: Data link protocol specification IEC 61158-5:2003, Digital data communications for measurement and control – Fieldbus for use in industrial control systems – Part 5: Application layer service definition IEC 61158-6:2003, Digital data communications for measurement and control – Fieldbus for use in industrial control systems – Part 6: Application layer protocol specification ISO/IEC 7498-1, Information technology – Open Systems Interconnection – Basic Reference Model: The Basic Model ISO/IEC 8802-3:2000, Information technology – Telecommunications and information exchange between systems – Local and metropolitan area networks – Specific requirements – Part 3: Carrier sense multiple access with collision detection (CSMA/CD) access method and physical layer specifications ISO/IEC 8822:1994, Information technology – Open Systems Interconnection – Presentation service definition ISO/IEC 8824-1:2002, Information technology – Abstract Syntax Notation One (ASN.1): Specification of basic notation ISO/IEC 8825-1:2002, Information technology – ASN.1 encoding rules: Specification of Basic Encoding Rules (BER), Canonical Encoding Rules (CER) and Distinguished Encoding Rules (DER) ISO/IEC 8886:1996, Information technology – Open Systems Interconnection – Data link service definition ISO/IEC 9545:1994, Information technology – Open Systems Interconnection – Application Layer structure