HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
Comments
You must login to participate in this chat. Please login.

when a wired device is portable, or wired can be removed for some reason, then a device will be removed from the network.

Iron

Default (golden) node to validate network communication with central control unit

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.

Iron

ok, classmates...and mr. jon...thanks & goodnight...

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.

Iron

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.

Iron

Thanks Jon. Terrific program.

Blogger

Thanks everyone -- Captain Video Awayyy....   (Ed Norton from old Honeymooners episode)

Iron

Fuzzy logic can play into this. It can be harder to code nd get your mind around.

Years ago, experminentation was done with a new type of logic element instead of just AND, OR, and inverter gates.

They tried to introduce majority gates. When enough inputs from different sources were input to a majority gate, it would trip.

 It was a tough concept for people to design with and never really caught on.

 

Iron

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?

Iron

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...

True, good planning is essential.

Also, leaving the hooks in a design for updating and changing.

Life is a learning experience.

So are many system designs.

Iron

the important is you need to plan first before anything else...

i agree with jcbacs...simple devices we have now are giving serious problem to the environment...

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.

Iron

Yes, Northwood is in NH.

Iron

Yes, it is hard to have a wired node to the space station. And it is true, the longer the distance, the more chance of a wired node failing, especially if subject to adverse conditons.

Iron

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....

Iron

Have to be carefull with internet access and protecting the environment. A not simple issue.

Iron

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.

Iron

Learned many things that hadn't occurred to me before.

Iron

same you all...i do really enjoyed with this event...with some points new to me...very interesting...

thank yo sir jon, sir rob and all my classmates attending in this session...

more power and good evening...

comment -- If no one is home and the motion detectors that normally turn on the lights for the occupants, it should provide an input to the security node. Call the cops?

 

Most police stations don't allow you have a machine call 911- It has to be a human. That's why central stations have become popular.

 

Also, pets can trip motion detectors too. Maybe pet based RFID systems can let a room know when a critter is passing through to solve this.

 

 

Iron

Bye everyone and again enjoyed the lecture.

Iron

Thank you Richard. I have found it is very difficult to stabilize line impedances, espcially when phase angles are shifting.

 

Iron

Thank you for the info!

Another thing about surge suppression. I have used Neons as surge suppressors. They kick in around 90 Volts so after your zeners are overcome you have another layer.

Iron

ok, thanks npitech for that info...

Your right about lightning strikes they can make things interesting especially when your controller in sitting on the highest piece of iron with miles of pipe going down into the ground.

Iron

The more technical, the more limited the audience. It's always a tough call to try and present for a larger demographic. It has to be somewhat rudimentary.

Iron

It's below:

Line impedance stabilization network -- often used in emi/emc testing.

Blogger

thanks for your advice digital_Angel...I will go through that...

LISN = Line impedance stabilization network -- often used in emi/emc testing.

 

Iron

by the way, what is LISN?

SO MANY ABBREVIATIONS, but I don't understand what's stands for...

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.

 

Iron

pretty fundamental, mostly introductory ... again, another good walk-thru -- would like a little deeper and broader content -- thinking through the previous course-work here on Digi-Key CEC, ...

Thanks once again Jon & Rob for another good lecture and its production.

Line impedance stabilization network -- often used in emi/emc testing.

 

Iron

ronaldgomeseria your welcome, note also changed format to a Bell202 modem from the previous mode.

Iron

very informative presentations...thanks

I am unfamiliar with LISN. Can you elaborate?

 

Iron

excellent information with you jon...i really appreciates

What about using SPI or SMBus?

Iron

I know there are a lot of acronyms. A rule of thumb is -- anyone who can create an acronym will.....

 

Iron

Thanks Jon for nice lecture.

Iron

Excellent information, see you tommorrow

Iron

Thank you Jon and Rob

Iron

Thanks Jon, another excellent presentation.

Iron

Too bad you don't have an acronym page.

Jon thank you for today's lecture

Iron

Can't you bring in your control through a LISN?

Iron

We're now on slide 19

Blogger

really, these are new to me...

We're now on slide 18

Blogger

"ethernet" is NOT "IP based"... these are different layers...

Iron

We're now on slide 17

Blogger

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).

Iron

ok, sir rob...we're following up...

UART = Universal Asynchronous Receiver/Transmitter Protocol Communication

 

Iron

We're now on slide 16

Blogger

RS - Recommended Standard

Iron

ok, thanks npitech, i am in way to ask what is UART...thanks

Universal Asynchronous Receiver Transmitter

Non return to zero

 

Iron

rs232 can be isolated (e.g. run over fiber with rs232 termination devices)

Iron

what do you mean by RS? e.g. RS-232...and NRZ?

i think Jerry, that's depends on the design...look at first with the diagram...

We're now on slide 15

Blogger

We're now on slide 14

Blogger

Light source illumination failure detected, nearby illumination device activated

Also need to be able to query system and find out what state it's programming is in. Has the teenager spoofed the security setting so he/she can sneak out without being noticed by Mom and Dad?

We're now on slide 13

Blogger

I agree with mr. jon with his explanation about slide 12...

We're now on slide 12Here's a question from Jon:

Can anyone think of another resource that may be availabel that can take this to the next level?

Blogger

a worse scenario - motion detector turns the main light on in the middle of the night... and wifee kicks you out with all the home automation junk... ;)

Iron

are you sure gwp2 with that?

so meaning to say, what we have today as far as automation is concerned are already exist long time ago...hmmmm....

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.

Iron

If no one is home and the motion detectors that normally turn on the lights for the occupants, it should provide an input to the security node. Call the cops?

Wired node is less reliable, long  distance and wire damaged or loos conection.

Iron

We're now on slide 11

Blogger

ok, i am following sir rob

We're now on slide 10

Blogger

In the string topoligy, if something goes wrong with the "bus" we have a total system breakdown... Does that make this topogy very unreliable or even prohibitive to use?

Iron

 What other types of Nodes can we see the need for going forward?

Blogger

Very interesting. I can see a need for flexible node command. For example, if the fire detection notes a rise in temp, the environmental controls shouldn't be tryingn to turn up the air conditioning.

too long to be possible...

Iron

We're now on slide nine.

Blogger

I meant. If the wired node is extremely long.

 

Iron

We're now on slide eight

Blogger

Power systems NEED to have the backup controllers in place

slide 6 - the problem is that the system was designed with no redundancy... not a centralized control architecture...

Iron

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.

a wired node is less reliable whei ti is not possible

as in the space station telemetry.

Iron

Hello everyone, I am late today.

Iron

Hello from Milwaukee!

Iron

Wireless node can re-connect on its own.

Iron

Wired node is not as reliable as a wireless is extremelly long.

Iron

When wire is damaged!

Iron

When wire is disconnected, the wired nodes are as reliable as the wireless nodes.

Iron

in case of broken wires

Iron

when wire fails... ?

Iron

We're now on slide six

Blogger

Jon's question:

When is a wired node not as a reliable solution as a wireless nodes?

Blogger

We're now on slide five

Blogger

string often referred to as bus ...

loop often called ring ...

tree sometimes called star (unless multi level deep)

We're now on slide four

Blogger

I assume, you call "string" what is commonly known as "bus"?

Iron

Jon's question:

Which topologies are missing ?

Blogger

We're now on slide three.

Blogger

Saludos desde Monterrey Mexico!!!

 

Iron

Good afternoon everyone

Iron

Hello from Sao Paulo, Brazil

 

Hello from El Paso TX

Iron

had to reload the page to get the player running...

Iron

audio is loud and clear

Iron

Hi all - Audio is live!

I'm from Albuquerque

Blogger

Greetings from Eastern Mass. Balmy 66F.

Iron

Hello from Albuquerque.

Iron

Hello all from mexico

 

glad you sent the message on the audio player not starting until 2PM

Sorry only dabble in SW..... primarily a hardware type though I do sweep the floors

Iron

howdy -

I bet Code Red is the choice of mad scientist coders

Iron

-Be sure to click 'Today's Slide Deck' under Special Educational Materials above right to download the PowerPoint for today's session.

Blogger

-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.

Blogger

Hello all

SW Engineer? water for me.

Iron

Good morning, everyone

Iron

If you are a SW engineer, you would be drinking Mountain Dew

Iron

-Please join our Digi-Key Continuing Education Center LinkedIn Group at http://linkd.in/yoNGeY

Blogger

"hey where is my starbucks?" In my town, try every other corner

Iron

The bad side is, I'm eating a typical engineering lunch a bag of vending machine cheetos.  Enjoy your fruit.

Iron

nice gwp2...here, i am taking some fruit for my dinner while waiting for mr. jon..

I'm enjoying a cup of Caffe Verona made here on my desk come on over and I'll brew you one to.

Iron

hey where is my starbucks?

Iron

Good afternoon from sunny Kansas.

Hi from dusty west Texas

Iron

i am just downloading our educational materials for reference unto this event...

thanks to our dear Mr. Jon for another scheduled event...as well as to my colleagues industry in attending event...a warm good evening!

Hi again from Chihuahua, Mex

Iron

Hi from sunny Panama City FL

Iron

Hello from Salt Lake City, Utah

Iron

Good morning from Mobile, AL

Good morning from Scottsdale AZ

Iron

Good morning from Buenos Aires

Iron

Good morning from Edmonton, AB

Iron

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.

 

 

Iron

@TomBee:  You have to be able to fool people to gain cooperation in your mad schemes... ;-) (At least initially.)

Iron

For a mad scientist he sure looks friendly ;-)

Iron

New Hampshire rather.

I don't know anyone from there for sure.

New England most likely...

Iron

Hey, where is Northwood ?

New Hamshier?

Iron

Where is Jon from ? East or West coast ?



Partner Zone
Latest Analysis
Self-driving vehicle technology could grow rapidly over the next two decades, with nearly 95 million “autonomous-capable” cars being sold annually around the world by 2035, a new study predicts.
MIT’s Senseable City Lab recently announced the program’s next big project: “Local Warming.” The concept involves saving on energy by heating the occupants within a room, not the room itself.
The fun factor continues to draw developers to Linux. This open-source system continues to succeed in the market and in the hearts and minds of developers. Design News will delve into this territory with next week's Continuing Education Class titled, “Introduction to Linux Device Drivers.”
Dean Kamen tells an audience at MD&M East 2014 how his team created the DEKA Arm to meet DARPA's challenge to design a better prosthetic arm for wounded veterans.
The new draw-it-on-a-napkin is the CAD program. As CAD programs become more ubiquitous and easier to use, they have replaced 2D sketching for early concepting.
More:Blogs|News
Design News Webinar Series
7/23/2014 11:00 a.m. California / 2:00 p.m. New York
7/17/2014 11:00 a.m. California / 2:00 p.m. New York
6/25/2014 11:00 a.m. California / 2:00 p.m. New York
5/13/2014 10:00 a.m. California / 1:00 p.m. New York / 6:00 p.m. London
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Aug 4 - 8, Introduction to Linux Device Drivers
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6


Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Next Class: August 12 - 14
Sponsored by igus
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2014 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service