2/17/2017 12:41 PM | |
Joined: 9/27/2006 Last visit: 3/28/2024 Posts: 12249 Rating: (2660)
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Hello Kicken; I am not able to provide a direct technical answer to your question, but I can point to ways of location the information your require. First: The S7-300 CPUs and their accessories are covered by a DNV GL certificate, as you can see (and download) from the following links: 6ES7315-2EH14-0AB0Technical information Shipping Approval, DNV / Det Norske Veritas, DNV (Det Norske Veritas)Certificate (to 2018) This certificate (as other maritime certifications) can only be applied if the manufacturer (Siemens in this case) submits its equipment to rigorous environmental stress tests approved by DNV GL By itself, it might serve as an argument for immunity to data storms as defined in the DNV GL documentation. If you need to locate more precise information on the specific tests required by DNV GL: information on the DNV GL certification tests can be located on the web quite easily; the difficulty might be in the details provided by DNV GL on each specific test. Here is one link, section 3.3 examines the different Network Analysis tests required to obtain certification: https://rules.dnvgl.com/docs/pdf/dnvgl/OS/2015-07/DNVGL-OS-D202.pdf 3.3 Network analysis For complex automation and safety systems, the network with its components, connected nodes, communication links (also external interfaces) shall be subject to an analysis where all relevant failure scenarios are identified and considered. Interpretation: 1) The requirement is basically applicable for all automation and safety containing nodes connected on a common network. However, for simpler systems, the above requirement is fulfilled by covering the most relevant failure scenarios in a test program. 2) The analysis should demonstrate robustness against network storm and other possible failure scenarios, as fail safe may not be achievable. It should specifically focus on the integrity of the different network functions implemented in separate network segments as well as the main network components (switches, routers etc.). 3) The main purpose of the analysis is to identify possible failures that may occur in the network, identify and evaluate So you might locate your answers with such documentation, and the DNV GL certificate assigned t the S7-300 CPUs.. Hope this helps, Daniel Chartier |
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