IEC PAS 62407-2005 pdf – Real-time Ethernet control automation technology (EtherCAT TM ).
2 Scope EtherCAT is a real-time Ethernet technology especially suitable for communication between control systems and peripheral devices like I/O systems, drives, sensors and actuators. This PAS is related to the ISO/IEC 7498-1 . This PAS gives an introductory overview on the EtherCAT technology and then specifies • The Physical Layer selection from ISO/IEC 8802-3 and IEEE 802.3ae • The Data Link Layer services and protocols in addition to those specified in ISO/IEC 8802-3. NOTE: ISO/IEC 8802-3 is not replaced, but enhanced in order to allow for improved real time behaviour. • The Application Layer services and protocols 3 Normative References IEC 61 1 31 (all parts), Programmable controllers IEC 61 1 31 -3, Programmable controllers – Part 3: Programming languages IEC 61 1 58, Digital data communications for measurement and control — Fieldbus for use in industrial control systems IEC 61 1 58-2, Physical layer specification and service definition IEC 61 1 58-3, Data link service definition IEC 61 1 58-4, Data link protocol specification IEC 61 1 58-5, Application layer service definition IEC 61 1 58-6, Application layer protocol specification IEC 61 784-1 , Digital data communications for measurement and control – Part 1: Profile sets for continuous and discrete manufacturing relative to fieldbus use in Industrial control systems
ISO/IEC 7498-1 , Information processing systems – Open Systems Interconnection – Basic Reference Model: The basic model (OSI) ISO/IEC 8802-3:2000, Information technology – Telecommunications and information between systems – Local and metropolitan area networks – Specific requirements – Carrier sense multiple access with collision detection (CSMA/CD) access method and physical layer specifications IEEE 802.3ae-2002: Information technology – Local and metropolitan area networks – Part 3: Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications – Media Access Control (MAC) Parameters, Physical Layers, and Management Parameters for 10 Gb/s Operation. IEEE 1 588-2002, IEEE Standard for a Precision Clock Synchronization Protocol for Networked Measurement and Control Systems ANSI/TIA/EIA-644-A-2001 , Electrical Characteristics of Low Voltage Differential Signaling (LVDS) Interface Circuits RFC 768, User Datagram Protocol Specification RFC 791 , Internet Protocol Specification RFC 793, Transmission Control Protocol Specification EN 50325-4, Industrial communications subsystem based on ISO 11898 (CAN) for controller- device interfaces – Part 4: CANopen 4 Terms, Definitions and Abbreviations For the purposes of this PAS, some of the following terms and definitions have been compiled from the referenced documents. The terms and definitions of ISO/IEC 7498-1 , ISO/IEC 8802-3 and IEC 61 588 series shall be fully valid, unless otherwise stated. 4.1 IEC 61 158 definitions For the purpose of this specification the following definitions of IEC 61 1 58 apply 4.1 .1 Application Function or data structure for which data is consumed or produced [IEC 61 1 58-5:2003] 4.1 .2 Application Objects Multiple object classes that manage and provide a run time exchange of messages across the network and within the network device [IEC 61 1 58-5:2003]
4.1 .4 Client 1 ) An object which uses the services of another (server) object to perform a task 2) An initiator of a message to which a server reacts [IEC 61 1 58-4:2003] 4.1 .5 Clock Synchronization Represents a sequence of interactions to synchronize the clocks of all time receivers by a time master [IEC 61 1 58-3:2003] 4.1 .6 Communication Objects Components that manage and provide a run time exchange of messages across the network [IEC 61 1 58-5:2003] 4.1 .7 Connection Logical binding between two application objects within the same or different devices [IEC 61 1 58-4:2003] 4.1 .8 Connector Coupling device employed to connect the medium of one circuit or communication element with that of another circuit or communication element [IEC 61 1 58-2:2003] 4.1 .9 Cyclic Term used to describe events which repeat in a regular and repetitive manner [IEC 61 1 58- 3:2003] 4.1 .1 0 Cyclic Redundancy Check (CRC) Residual value computed from an array of data and used as a representative signature for the array [IEC 61 1 58-4:2003] 4.1 .1 1 Data Generic term used to refer to any information carried over a Fieldbus [IEC 61 1 58-3:2003] 4.1 .1 2 Data Consistency Means for coherent transmission and access of the input- or output-data object between and within client and server [IEC 61 1 58-5:2003]