Asked foreign engineers for explanations of ‘identical’ or ‘diverse’
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This post was last edited by lllllljjj on 2010-9-2 at 15:07. The section on sensors in ISA 84.01 states as follows. B 1.5.3 For SIL 3, identical or diverse separation between BPCS and SIS is typically needed to meet the required safety integrity. What does identical or diverse mean? ----------------------------------------------------- The explanation given to me by a foreign engineer: \"Identical\" means using the same technology for both the BPCS and the SIS. \"Diverse\" means using different technologies from the same manufacturer, or technologies from two different manufacturers. \"Separation\" generally refers to physical separation, that is, the same instruments/actuators/logic solvers/wiring are not used for both the BPCS and the SIS. Diverse separation helps reduce common failures and systematic faults, in addition to reducing random failures. Since the components are the same in the case of identical separation, common or systematic faults can affect the performance of both the BPCS and the SIS. Last edited by emir001 on 2007-12-31 13:26]
Foreign engineers explained it well. For example, in the design of instrumentation systems in our country, it is also required that DCS control systems and ESD emergency shutdown systems use different systems and physical hardware according to various safety level requirements, in order to enhance safety and reliability.
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Ugh, the so-called “Japanese engineers” mentioned by the poster are just foreign engineers – how can that be considered “hostile speech”?
Could it be “aggressive speech”? When you’re just starting out, you need to be very careful; otherwise, the points you’ve worked hard to earn can be deducted accidentally. :funk:
For an overseas project that our company is currently working on, the preliminary work was done by Japanese people; we privately call them ‘devils’, and everyone uses that term for them, from top to bottom, though we don’t say it in their presence. So I think people shouldn’t take this term too seriously.
When I say “devils,” it’s a playful way of referring to foreigners; there’s no ill intent at all! Where does the “aggressiveness” come from? ? ? On the contrary, by posting his words, I am showing my admiration for his explanation! Don’t the moderators check the content? ? If I really want to attack him, do I need to post his explanation? ? ? It’s such a miscarriage of justice! I went to the trouble of posting this to share it with everyone, only to be treated like this; I’m going to file a complaint with the management! This post was last edited by emir001 on 2007-12-30 20:56]
Let’s stop arguing. At first, I didn’t understand it either just by looking at the title; it was indeed a bit ambiguous. Be more careful next time. The discussion is over.