MAY-JUN 2017

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COVER STORY 14 INTECH MAY/JUNE 2017 WWW.ISA.ORG Device replacement When replacing a device (1:1), the con- figuration of the previous device shall be loaded automatically and the mea - suring process continued without any extra effort or input. Replacing a device with a newer model of the same type and by the same manufacturer shall be possible at any time. It shall be in - dicated on the device which versions may be used for replacement. The interchange of devices provided by different manufacturers shall be pos - sible over an agreed range of functions (NAMUR parameters, profiles). Default setting It is also necessary to deliver devices with preset uniform parameter sets (default settings) in accordance with NE 131 and NE 107. Marking In addition to marking in accordance with NE 53, the type plate shall have a clear and nonproprietary marking so that the devices can be identified as Ethernet devices (e.g., logo). Diagnosis, status The status signals according to NE 107 shall be consistently supported by de- vices, systems, and components. Detailed diagnosis Causes of changes in status (detailed information from devices and compo- nents) shall be automatically transmit- ted to higher-level systems. Web server If the devices can be configured via a web server, parameters shall be auto- matically matched across the entire sys- tem to prevent inconsistencies between data sets. The presentation and the pa- rameters used shall be identical in the web server and the device package. The web server shall be provided with an ac- cess protection. Security Transmission mechanisms shall com- ply with the state of the art in safe- ty technology (e.g., encrypted and signed). The mechanisms for filtering and blocking shall also be state of the art (e.g., MAC address filters, whitelist- ing, blacklisting). Synchronization The network time shall be synchronized. Time stamp The protocols shall include a time stamp. Authentication Authentication mechanisms shall be capable of verifying the authenticity of software and devices. IP address IPv6 addresses shall be used to address the devices. Tag identification The devices shall be identified by means of a freely configurable tag (at least 32 characters) and the MAC address. Communication status The system should be able to monitor the status of communication, including infrastructure components. This could be the transmission time between a field device and switch or the number of telegram repetitions. Topology recognition An engineering system shall be capable of automatically reflecting the logical plant topology and device hierarchy. Redundancy It shall be possible to implement re dun- dant controls and infrastructure com- ponents to increase availability. Life cycle All devices and components shall be designed for a life cycle of more than 20 years under process industry conditions. Compatibility and interoperability During the entire life cycle, it shall be possible to retrofit new devices and components and replace old ones with new ones. Technical innovations shall be capable of running both new and old infrastructures and of adapting au- tomatically to the existing infrastruc- ture (e.g., bandwidth adaptation). Integrating existing concepts It is also necessary for existing fieldbus facilities to create transparent transitions between existing fieldbus and Ethernet systems. These transitions (proxies) shall have at least the same functionality as current fieldbus masters. Certification Certification shall ensure the confor- mity of devices and components with all requirements made. The certified de - vices shall be indicated at a central point (e.g., a website). Costs The costs of an Ethernet solution shall be comparable with those of 4–20 mA HART. Industry cooperation Other standards organizations are align- ing to cooperate with the Industry 4.0 for Process initiative. Networking: Ethernet/IP and Profinet Both ODVA and PROFIBUS & PROFI- NET International (PI) are working to- ward meeting the requirements, since NAMUR calls for protocols IEC 61784- 2 CPF 2/2 Ethernet/IP and IEC 61784-2 CPF 3/5 Profinet IO CC B to become minimum binding requirements for the process industry (noting these proto- cols need to be revised to meet process industry requirements). At the 2016 SPS IPC Drives Show, ODVA announced activities with NAMUR to ad vance the adoption of industrial Eth- ernet in the process industries. The fo- cus will be an activity to continue the refinement of formal requirements for an Ethernet communication system for the process industry. This will be through a collaboration between WG 2.6 Fieldbus and the ODVA Special Interest Group for Ethernet/IP in the Process Industries (Process SIG). Among the topics of the cooperation are device diagnostics, de- fining a device profile for process devices for Ethernet/IP, and integration of HART devices into Ethernet/IP. Another part of the cooperation is the installation of an Ethernet/IP system in the first half of 2017 in the integra- tion and industrial communication test

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