Fibreoptic communication is also a great alternative for hazardous areas like refineries, fuel storage facilities, petrochemical plants etc. Probably cheaper in the long run compared to using intrisically safe wiring, Zener barriers and opto-isolators.
A sequel to slide 11: Peripheral lighting control for occupied office areas to regulate lighting or lumens where daylight is available compared to the interiors of the office away from the windows/daylight. Been around for a couple of decades.
Takeaway: The point about backing up the automation controls is more readily possible using secure cloud servers. Disaster Recovery Infrastructure (DRI) should be a part of every critical automation system to prevent loss of production, control settings, recipes and archived files.
Does fuzzy logic play a role in automation in the U.S. market? Seems like Asian countries especially Japan is more open to fuzzy logic compared to the West who are wedded to binary algorithms. Fuzzy goes hand-in-hand with AI and artificial neural netowrks (ANN). Any thoughts?
that's true jongabay...when you are doing in such fields or rather involve, you will be surprised...that's why, going through and while doing our job plus attending like this kind of event or any educational matters are truly learning process...
I remeber circuit cellar. i used to love that series. I can relate to situation when things go wrong. That's why you should live with the technology before introducing it. I once motorized a door and was trying to get in while a wise guy on the other end kept closing it and overriding my command from the inside. Planning for Snafu's is important.
About 20 years ago, Steve Ciarcia had a series of articles on his Home Automation/Security system in Circuit Cellar. It was a DIY project but very elaborate.
He once got locked out with a roast in the oven. He had to defeat the security systen by crawling on his hands and knees, in the dark, barking like a dog. He managed to not trigger the air raid sirens....
The point about Ethernet playing well with internet is that there are many manufacturers of low cost access points and bridges that seamlessly bridge WiFi, Ethernet, and Internet connectivity. Any high volume products are usually more cost effective.
Surges and spikes can wreak havoc with any wired or ac powered system. Surge suppressors and MOV only can absorb so much energy. I used to repair alarm systems that were in proximity to lighting strikes. If mother nature wants to get you , she will.
ronaldgomeseria, farely sure we did't loose the account, and eventualy convinced them to go to a radio based equipment on new installs. bsaically designed several surge protection modules based on gas tubes and MOV's, along with developing a grounding system that was distributed through out the field. Sure I probably make a few mistakes since I was the jounior engineer but the results elimited the issue with cloud based surges (these surges would make the voltage on the data wire rise to the 5kv range).
Analyzed issue with pump-off controllers and injection controllers back in the mid 80's where they didn't want to use radio based data transmittion from the well controller to the central office. They strung miles of wire in an arid environment and every time a clould when over they would lose several pieces of equipment. Plus side is I learned a lot about surge protection and believe it or not actually made the system reliable.
Devices are being designed with built-in intelligence, so to impliment central control this results in a major problem: Who's in charge? Often the individual devices must be "dumbed down" which is a waste of money and resources.
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A little digging around will turn up the word "Holonic" to describe hierarchical systems with distributed intelligence -- also referred to as "self Organizing. I have designed and implemented some of these systems -- they work well.
People interested in the idea should do further searching on the concepts Jon presents in these lectures. It's well worth the time as it mitigates many of the downsides to control systems that would otherwise give poor results overall -- since they only find local optimums.
Looking forward to the ideas presented today -- although I may have to catch the talk later.
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