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Just catching up -- better late than never.

Iron

Lecture good but PPT a little weak.

Iron

Looking forward to the future classes ....

Still haven't seen a slide on ladder diagrams :(    ... If you're copying stuff off the internet why not pull up a few more images and make a few more slides and coordinate the graphics to the verbal discussion.  This would greatly improve the learning and retention that should be occuring here and improve the take-away data package of what should be a self documenting seminar/course ... Max, the Fagin of Industrial Control (Dickens, Oliver Twist) ...

Very disappointed, much more could have been covered here as this should have been the culmination of much of the previous efforts.  Sensors, Actuators, Programming, Vendors and Platforms, numerous application examples and on and on ...

Picking this one up again

Thanks a lot Max.  Great job again.

Iron

delayed participation due to travel

 

Iron

good presentation Max.

Iron

Hi folks, I can hardly believe I'm still here trying to log into the course.

 

Iron

Thanks Clive 

I especially like to keep hearing about the robot arms

a topic I spent alot of time in college working on

a new moderator

surprising

Late again!!! >:O. Thank you for the recorded lecture.

Iron

@schmick was there a mosre specific type of microcontroller or wireless you were interested in?

 

Iron

@gschmick - Yes, if you login to view the archive, you will be able to hear the audio.

Iron

Here is a document that discusses many of the same topics as today's lecture.  It also includes some typical applications and how to select a PLC.  http://www.automationdirect.com/static/specs/chooseaplc.pdf

Iron

@Joyce:  Is the audio available in archive?  I missed Max's answer to this question right at the beginning (did anyone else get it?).  He mentioned Atmel, ST Micro , and another.

MAX - Thanks for the research on uC's with RF!  I wasn't quite fast enough to get them all down, could you repeat them here?  Thanks.

Iron

See you Thursday..Joyce!!

Iron

@Max: PLCs are relatively less rugged and not very flexible with I/O config. and this is why they aren't used for RTU (remote teminal unit) applications. DCS on the other hand withstands harsh environment ocnditions. Would you be able to tell us more about this?

Thanks and have a great day Max.

Iron

Thanks for a great presentation, Max!  Alex will be back Wednesday folks, see you tomorrow. I'll be back Thursday.

Iron

Actually everyone is talking about their grade for graduation. I don't think there is a voting system...:o)

Iron

OK -- I have to run -- I hope to see you all tomorrow -- Max

Blogger

@How do we vote for you

I have no idea -- I didn;t even know that ther ewas a voting/scoring mechanism -- now I'm desperate tto see how well I score against the presenters of other courses :-)

Blogger

CLIVE how do we vote for you???

@Hi Max, have you checkk out Rasberry Pi? Any thought/ advice on it? thanks..

No advice, but lot sof thoughts -- I think it looks great -- I can't wait to get my hands on one :-)

Blogger

Hi Max, have you checkk out Rasberry Pi? Any thought/ advice on it? thanks..

Iron

In addition to PLC's, CNC, and PID controllers there are also DCS (Distributed Control System), and Motion Control Systems. Again between PLC's, DCS's, and Motion Control systems there is blurring of the edges.  But boadly PLC's are relitively quick, and usually used for controlling solenoid valves, relays, and other On/Off Devices, where as DCS's usually controlled slower analog processes.

 

Mr E -- if you go to the various vendors -- like National Instruments or Rockwell Automation and do a search for "Case Study" I think that might give you what you are looking for

Blogger

Thanks Max,

I've used the Modicon PLC with ProWorx 8 Ladder Logic Software for industrial control.

It was very simple to program with LL and be able to control 12 relays for timed shunting of a test process. using external relays.

Iron

@Max, Just observing that the features that were available on a single PCB at one time are now available as a uC or Soc. It used to take a whole board of electronics to do simple things years ago.

Iron

@THasham - I'll have to find out about that.

Iron

@luizcosta "The grade for today is still at 18. Does it change later?"
What grade? There's a grade? I had no idea -- quick everyone -- start voting saying how wonderful I am :-)

Can I vote myself? :-)

Blogger

@Clive: Surely we would not want a case study to degenerate into an ad for any particular manufacturer, but seeing a specific example (or perhaps several examples, with several different manufacturers products) would really clarify how to apply these things. Or include some real-world problems with several candidate solutions using different techniques (and equipment once again from several manufacturers), even if those solutions were never actually deployed anywhere, just to show how it might done.

Iron

IRON
Thank you, but now it is only at 19.

Iron

@Joyce - What do you think?  Will you ever be making the audio portion downloadable as an .mp3?

Iron

@ "SoC taking the place of older SBC?"

No -- if you check the archive of Part 1 of this course, you will see that SoC Stands for System-on-Chip -- thsi is a silicon chip that contains one or more processing cores, on-chip memory, peripheral functoions, and all sorts of stuff. An SBC is a single board computer -- this is not to say that you might not have an SoC on an SBC (but that woudl not be common)

Blogger

It will be greate if we can download the lectures, like mp3.etc.. Is it possible?

Iron

@luizcosta- My own went up.  Did you refresh the page that had the score on it, and did you post at least 5 times today/yesterday?

Iron

@Ranjitha Anand- I didn't see that you also responded to me; thank you as well

Iron

@MazianLab - I'm not sure, will have to look into that and find out. The archive should be available for a year, though, and you can download the slides.

Iron

@Max - I think most of us are still not all that clear on the distinction between a PLC and a PAC.

Iron

The grade for today is still at 18. Does it change later?

Iron

Joyc.e2@, Is it possible to download thses lecture? It would be great if we can have them as refrences

Iron

I lost audio on about slide 11.

I hope this presentation helps to make manufactures and engineers understand what we both need more of..

GREAT LECTURE CLIVE!!!

@ "...and the uninterrupted presentation from Max was very much appreciated." 

Oooohhhh - you just wait until Alex comes back tomorrow and reads this transcript....

Blogger

I'm pretty novice at this.  Thank you Max!  I get the big vision on using these controllers for enterprise use.  I would love to figure a way to network a series of feedstock feed machines for CNC or 3D printing and create a rapid prototyping environment entirely controlled at the enterprise level by the design-engineers.  Literally a "turn-the-lights off and walk away for the evening" operation.

Design in 3D, validate the designs, and then produce an assembled prototype all overnight.

 

 

Iron

Thanks @aa1bb2cc3dd4

Iron

@THasham - The archive should be available for a year.

Iron

Thanks for the presentation, Max, and for hosting, Joyce.  Very pleasant voice and the uninterrupted presentation from Max was very much appreciated.

 

Does anyone know, how long these archives can be accessible? thanks.

Iron

@Mr E. You mentioned that you woudl like me to talk about real case studies -- unfortunately I was told that I had to keep mention of specific companies to a minimum -- the other problem is tha tevery PLC and PAC and SBC is sto different that having a case study with one set of units might not be tremendously relevant with regard to another deployment o renvironment

Blogger

@syakovac - the audio portion is over...

Iron

Max, Thank you again for amazing pesentation.

Iron

Max - Thanks for the research on uC's with RF!  I wasn't quite fast enough to get them all down, could you repeat them here?  Thanks.

Iron

thank you max, great presentation. thanks again joyce.

Iron

I lost the audio mid-word.  anyone else?

Iron

Thanks Max for a great session!

Iron

Thanks for a great session Max!

Thanks Max and Joyce, see all tomorrow.

Iron

as always it is great lectures. THanks again.

Iron

Thanks Max and Joyce

 

Iron

Thanks again Max for another great lecture

Iron

Max, thank you for the lecture!

Iron

Great info! Thanks!

Iron

Thanks Joyce for stepping in for Alex.

Iron

Thank you Max and Joyce.

Iron

Re:  Is it safe to assume that the ability of one companies PLCs to control anothers PLCs is universal, or was it just that one company that they were able to do this with?

A better assumption is that they can't communicate at all.  Communication is more difficult than it needs to be, athough that is changing.  Modbus and modbus over ethernet are common.

Iron

@Zwilrich - yes I can see there is a wide range of controllers, from simple to more complex. But generally speaking, they contain the primary operator control to the machine. That is, the 'start', 'stop', 'continue' and 'safety' switches. ??? 

Iron

It also depends on the supplier of the equipment you are intrested, some create their own controls or use another manufacturers' PLC.

Iron

@clia: most systems are interoperable. Please heck this link for concept of OPC. http://www.opcfoundation.org/Default.aspx/01_about/01_whatis.asp?MID=AboutOPC

@Greekeng- Thanks

Iron

Ah! I heard Max mention case studies. That's what I hoped we would get today - not just overall generalities that we have discussed before, but detailed, specific instances of employing PLCs, PACs, and SBCs to develop some real-world industrial process.

Iron

SoC taking the place of older SBC?

Iron

I've used DCS systems for very large process oriented systems and PLCs like Siemens S7-200\300\400 for again very large process oriented systems, and ABs for more local smaller packages, all system have a benfit and will fit almost any application.

Iron

Is it safe to assume that the ability of one companies PLCs to control anothers PLCs is universal, or was it just that one company that they were able to do this with?

Iron

PLCs/PACs don't offer ruggedness and flexibility with I/O config. required in RTU applications. DCS is mostly used to withstand harsh environment conditions. Can anyone shed light on that?

Oops- must have hit a wrong key- certainly didn't intend to use the large print!!  Sorry.

Iron

back to the hand over the head and grab a pencil example... (not only the slidepack is repeated)

Iron

@jrjohns- Again, thanks for the info.

Iron

Q: I think the purpose of PLC's and PACs (in simple terms) as the automated interface between the operator and the machine/press. Is it something different?

They are more than that.  Frequently, they are a complete control system that controls an entire process with minimal human interaction.

Iron

single board computer was just a uP with ram and Rom monitor at one time. you still needed operator interface, off-line storage, a power supply, case...

Iron

Actually most of the PAC programming is done in the 6-1131 graphical programming languages such as Ladder LLD.

multi-board SBC???

Iron

Some designs have hardware FPUs as part of the ASIC design.

@cmeadows6959 - the h/w eng should implement what the sys eng would like to have and let him know if there are some limitations in the design, or could not be implement the way he wants

Iron

Job Titles are in the hearts of the beholder

Iron

jjrochow@, Can we use C or C+ for programming the SLC500 and SLC5K?

Iron

Rockwell also has dedicated ASICs

@cmeadows6959 - Do System Engineers design at the component level like a Hardware Engineer does?

Iron

Q: I think the purpose of PLC's and PACs (in simple terms) as the automated interface between the operator and the machine/press. Is it something different?

Iron

WHERE DO WE DRAW THE LINE BETWEEN SYSTEM ENGINEER AND HARDWARE ENGINEER ???

There can be a tight integration between a Logix PAC and a model simulation.

Again, Max. Thanks for displaying our Logix 5564 PAC.

 

Re: Scan cycle of 100 millisec cannot work with fast counter! I.e. range 10 ms

Which is why vendors sell counter modules.  The module can count at up to megahertz rates.  When the scan cycle gets around to reading the counter, the counter has the correct value.

Iron

How is "life of OpenPLC" idea? I believe born in Europe

sounds like PLC was retained as a familiar term while they evolved to keep up with technology.

Iron

@, yes, this is what I mean.

Iron
Thanks another great session
Iron

Scan cycle of 100 millisec cannot work with fast counter! I.e. range 10 ms

If input variation speed is higher than input scan cycle, PLC is going to miss to read some input.

Iron

@JowWojcicki- Thank you also

Iron

@Caa028--same here

 

Iron

@EugeneM- Thank you

 

Iron

step 1 - input scan

 

Iron

@densgt - Fred Eady has had a number of good articles in rcent Nuts & Volts magazines (The Design Cycle column) that discuss the Digilent Chipkit Arduino hardware & software - Pick up a copy of the March 2012 issue to see about the Uno 32 -

Iron

"deja vu" with the slide pack today...

Iron

good one re "eye candy"...

Iron

Sorry. I'm a bit late today, but not by an hour like y-day

Iron

@jrjohns- Thanks for the info, I'll look into it.

Iron

Sorry, I'm running late.

Iron

@densgt - Take a look at the Chipkit Arduino compatable boards from Digilent - Uses a PIC 32 chip and can be programmed as Arduino or as native PIC 32 - They also have some interesting shields (add-on boards)

 

Iron

Hi Max, Will you please type those parts to post, please..

 

Iron

hello max, hello joyce

Iron

Good to hear you again, Max.

Iron

Yes... tons more-pleasant intro audio.

 

May be some one has alreay asked this question, but I missed it for some reason. Please let me know how long the archives will be able to access?

Iron

alex sounds so much better today

Iron

Hi Everyone.  Thanks to various people mentioning the Arduino yesterday-  It looks like a great product for what I need, though I've just started to investigate it.

Iron

Hi Max - looking forward to today's session.

Iron

Good afternoon here

Iron

hello from sunny MIAMI

Hello everyone!

 

Iron

Max, are you providing signed copies (BeBop to the Boolean Boogie)for everyone?

Missed yesterday's...saw it at lunch time.  I am ready to BeBop to the Boolean Boogie for this one

Expecting next "rich in knowleedge" day

Hey folks.  It's good to be back again.

Iron

good day everyone. it's good to be back...

Iron

Good day Everyone! Clear blue sky with spring weather from VA, hope everyday will be like this..:o)

 

Iron

Missed yesterday's...saw it at lunch time.  I am ready to BeBop to the Boolean Boogie for this one

Also, @laango12, you might try a different browser. If you're on IE, try FF, for example.

Iron

Thanks Joyce, I'll try that again

Iron

Good morning all. Sometimes the audio intro loops until the browser is refreshed. It happens with both Chrome and IE.

Iron

The streaming audio player will appear on this web page when the show starts at 2pm eastern today. Note however that some companies block live audio streams. If when the show starts you don't hear any audio, try refreshing your browser.

Iron

Yesterday my audio was not working correctly, and today I'm trying to fix this problem still no good result.

 

Iron


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