In general this class could have been made better by reducing some of the overlap and repetition, expanding the slides for self documenting presentation, and perhaps gaining enough time to add another 22 or so slides either in one session or across sessions where a 'typical or hypothetical' Industrial Control application was walked through, from sensors to actuators to processors to software to standards and etc. Many don't seem familiar with 'ladder logic' I believe there are many other concepts which could have been touched on and integrated to make a good course even better.
Same comments on slides -- replace verbage with text, expanding the summary slides into individual slides wit h the bullet becoming the title and adding your verbage as sub-bullets.
clla, yes I did. I was expecting to go to a website to download the list but it appears that clicking on the link automatically downloads th file. Thanks.
I clicked on the link you provied and nothing happened. I copied and pasted http://bit.ly/AlbpKq into my brouser and again no luck. is http://bit.ly/AlbpKq correct or is there another way to get there?
@Max- I was curious if there was anyone who goes back and checks the comments on the archived webpages. I notice that you can still make comments on them when you go through the lecture. Should we pose questions there, or is there a generic email that we should be using?
OK Sorry chaps (and chappesses ... i.e. chaps of th efemale persuasion) ... I'm afraid I have to run -- but I look forward to seeing you for the next course ... I hope youall ghave a WONDERFUL weekend
I think I hear a cold beer calling my name .... "Max, Max, where are you?"
"Yeah, I have fallen asleep to the tune of several operation manuals myself!"
That's one reason why I likes the "Process Control Case Histories" book -- the author starts off by saying "I first recognized technical writing can be boring when I fell asleep proofreading one of my own works..." h egoes on to say that this is why he started to wroite in a more engaging and chatty style (he succeeds)
:) Re: Genetic Algorithms and including sub-topics of your own particular interest: The more esoteric stuff was appreciated, at least by me. Bye 'til next week-of-seminars.
Someone said "Thanks Max. Exceptional week of presentations... I especially appreciated the genetic algorithms part because it was completely new to me..."
Thanks fo rthe kind words -- I wanted to drop a bit of thsi sort of stuff in because I always try to create presentations and writ ethings that I woudl like to hear and see myself"
I love technology, but sad to relate mose technical writings and presentations bore my socks off :-(
My background in Industrial Control systems was garnered during my years of employment in the Rail Industry as a Systems Integration Engineer. We have two failure modes to contend with.
The expressions A wrong-side failure, and a right-side failure are used to describe them..
Someone asked "SHOULD THE HUMAN INTERFACE BE MORE SOFTWARE OR HARDWARE CONTROLLED?"
One answer is that every system is different - -but if I understand the question correctly, I woudl say that software is best in thsi case because it's easyier to program complex if-then-else type scenarios -- and to modify them -- in software -- also that when it comes to communicating wit hhumans software is more than fast enough...
Thanks Max. Exceptional week of presentations... I especially appreciated the genetic algorithms part because it was completely new to me (although I don't think I understand it... it seems very complex... worthy of a whole week in and of itself).
Because before I read it I really didn;t understand much about RTOSs ... and after I'd read it I did :-)
This RTOS is very small and is ideal for embnedded systems with mimited amounts of menory - -also the previous version has ceen used in safety-critical aircraft systems...
I got in very late, and missed a significant portion of todays lecture. I have to say that I really love the fact that you can immediately listen to the whole recording as soon as it finishes! Great set up that you have here!
One of the books that I woudl really recommend is the "Process Control Case Histories" -- thsi is by a guy who designs and troubleshoots real-world control systems -- it's not a think book, but it is a really fun and instructive read...
The silly thing is that I just realized that I didn;t include any of th ebooks I've written -- but you can look for "Bebop to the Boolean Boogie" and "FPGAs: Instant Access" and "How Computers Do Math" on Amazon.com (assuming you are interested, of course :-)
Max, A couple of times you have mentioned an automated warehouse where "humans" aren't even aware of where items are stored within the warehouse. I have heard of one such warehouse where they even turn out the lights in the warehouse since light is not required for the material handling equipment to store and retrieve items stored there. In addition to saving a significant amount on the electric bill, it also serves to really keep the "humans" in the dark.
Great "summary" XXI Century Opened Pandora in Safety m? security. Example for engineers are Fukushima, BP on Gult. Explosions in mines and gas pipelines...
@ danlafleur - all safety systems depends on how much physical resources are available to implement it, how important is the system itself (for the souroundings) and how much money you can invest in it
What do the standards say about distributed systems? Redundancy in those systems may be sort of inherent in the nature of the system but each device will probably not have a dedicated redundancy. Are there exceptions in the standards for such systems?
@KevinJam: I am not sure if this answers your question. A basic process control system monitors/controls a process (continuos/batch). A safety system does not interfere unless there is a trip (emergency shut down, burner management system or fire and gas system, etc). control is shifted from a basic process control system to the safety instrumented system.
@ danlafleur - you know that the sanity check is just a partial check or level of protection. that doesn't cover all aspects, just what we want to check.
Actually, first year failures often weed out "lemons" -- those vehicles (or systems) that make it through year 1 without failure may have significantly better reliability than the population as a whole (that is, including those that failed during the first year).
How does PFD (Probability of failure on demand) of the Basic Process Control System impact on the Risk reduction factor calculated for the independent Safety system.....and hence maintenance of the SIL (Safety integrity LeveL)?
How does PFD (Probability of failure on demand) of the Basic Process Control System impact on the Risk reduction factor calculated for the independent Safety system.....and hence maintenance of the SIL (Safety integrity LeveL)?
A safety system is usually a PLC designed to shutdown plants in emergency cases. A DCS controls/monitors continuous process. In case of shutdown, PLC(designed with configured as a safety system) is the master.
Read an interesting cascading failure discussion resulting from poor mfr QA. Torpedo battery cook-off may have resulted in the loss of USS SCORPION, a US attack submarine. Foil membrane failed under vibes much less than the normal encountered at sea. Membrane failure caused a battery fire which cooked off the torpedo warhead only a few inches away in the body of the torpedo. Caused low-order detonation which caused torpedo room flooding and a loss of depth control leading to the sub falling below crush-depth.
I'm hoping you will discuss Rockwell vs Allen Bradley (& others) safety products in relation to the widely accepted safety standards. Are these big players setting the standards? Or do the standards come from a wider community, historically speaking? Thank you, I canot be there for the slotted QA timeslot.
Wow, somethings just get better with age. I just read an article about how a version of Kermit was used on the ISS to solve a communication problem between two incompatible systems.
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