You are not registered yet. Please click here to register!


 
 
plc storereviewsdownloads
This board is for PLC Related Q&A ONLY. Please DON'T use it for advertising, etc.
 
Try our online PLC Simulator- FREE.  Click here now to try it.

---------->>>>>Get FREE PLC Programming Tips

New Here? Please read this important info!!!


Go Back   PLCS.net - Interactive Q & A > PLCS.net - Interactive Q & A > LIVE PLC Questions And Answers

PLC training tools sale

Reply
 
Thread Tools Display Modes
Old March 15th, 2005, 02:26 PM   #1
Lancie1
Lifetime Supporting Member
United States

Lancie1 is offline
 
Lancie1's Avatar
 
Join Date: Jul 2003
Location: Alabama
Posts: 10,002
STUDENT QUESTIONS, please post them here!

Several have asked for a place to post student questions, so here it is. Go to it, all you students!
  Reply With Quote
Old March 15th, 2005, 11:27 PM   #2
Unregistered
Guest
 
Posts: n/a
I need program to give my instructor. Does not matter for what plc, we have none here. We have not had program instruction. One day assignment was what is a plc. One day assignment was what is a program. One day assignment was name 2 brands plcs. Most failed that one.

Also, if anyone have autocad, please email me copy.

Thank You.
  Reply With Quote
Old March 16th, 2005, 04:12 AM   #3
Ken Moore
Member
United States

Ken Moore is offline
 
Ken Moore's Avatar
 
Join Date: May 2004
Location: Upstate South Carolina
Posts: 2,325
Talking Right

You can download programs here: http://www.plcs.net/downloads/

List your email address and I'll forward it to AutoDesk, perhaps they can help you out with the Autocad request.
__________________
"To give real service you must add something that cannot be bought or measured with money; and that is sincerity and integrity."
- Donald A. Adams

  Reply With Quote
Old March 16th, 2005, 10:29 AM   #4
Lancie1
Lifetime Supporting Member
United States

Lancie1 is offline
 
Lancie1's Avatar
 
Join Date: Jul 2003
Location: Alabama
Posts: 10,002
Unregistered,

Here is a LogixPro program and a challenge for all students. This is a ZiPPED LogixPro file, type *.RSL

The situation: You and your buddy Joe flunk out of the PLC training class. Deciding to go into the job market, the best jobs you can find are at a Chicken Processing Plant. Your jobs are to take incoming ckicken carcasses and hang then on the overhead chain conveyor that takes them into the scald-and-dip tank.

The boss finds out that you and Joe have PLC training, so he asks he to make some changes to the Chicken Conveyor program to make it run faster. Joe says that there is no reason to tell him that you had flunked out of PLC school.

One Monday after a wild weekend party, Joe is hanging a chicken on the hooks. He slips on the wet floor, and the next hook catches Joe's belt and drags him off his feet and towards the scald tank. Your job is to stop the conveyor before Joe is scalded like a dead chicken. Unfortunately, the program Stop Pushbutton does not work exactly like you and Joe thought it would....
Attached Files
File Type: zip Chicken_Conveyor.zip (1.1 KB, 83 views)

Last edited by Lancie1; March 16th, 2005 at 10:32 AM.
  Reply With Quote
Old March 16th, 2005, 12:45 PM   #5
Lancie1
Lifetime Supporting Member
United States

Lancie1 is offline
 
Lancie1's Avatar
 
Join Date: Jul 2003
Location: Alabama
Posts: 10,002
Here is a revised version of the Chicken Conveyor.RSL
Attached Files
File Type: zip Chicken_Conveyor2.zip (1.0 KB, 96 views)
  Reply With Quote
Old March 24th, 2005, 08:48 AM   #6
Unregistered
Guest
 
Posts: n/a
Angry Chicken

Good Morning lancie1

I too am a student of PLC's evidendly not as savy as you, since I have worked in Poultry for the last ten years.

It is the best Job I ever had, I have worked on a piece of everything in all industies and made good money.

Maybe one day I can be like you Sitting at a desk programming away?

regards

Chicken Man
  Reply With Quote
Old March 24th, 2005, 09:49 AM   #7
davidg68124
Member
United States

davidg68124 is offline
 
davidg68124's Avatar
 
Join Date: Feb 2005
Location: Omaha, NE
Posts: 313
You fail to see the sarcasm in his post, second unregistered guest. He is not poking fun at the Chicken Plant. He is poking fun at him and his buddy. It is classic now, that 95% of the students that come on here want us to do their homework or tests. They have no desire to even give it a try. And then they ask for something like AutoCAD. What a joke.

I am glad you had a good experience there. My own background had me in the Pork and Beef Slaughter industries. They were good jobs, too.

But the fact is, do you want to stay in that kind of job? No, otherwise you wouldn't be here right now.

David
__________________
The PRICE of FREEDOM is not FREE! My son is now a United States Marine and I could not be more proud of what he and others will do to protect our freedoms here at home.
  Reply With Quote
Old March 24th, 2005, 11:58 AM   #8
GregPLC
Member
United States

GregPLC is offline
 
GregPLC's Avatar
 
Join Date: Oct 2002
Location: Milwaukee, WI
Posts: 342
As you can see, this is already a bad idea...
__________________
  Reply With Quote
Old March 25th, 2005, 02:06 AM   #9
Lancie1
Lifetime Supporting Member
United States

Lancie1 is offline
 
Lancie1's Avatar
 
Join Date: Jul 2003
Location: Alabama
Posts: 10,002
Chicken Man,

I do not mean in any way to insult you. I really appreciate that there are those who are willing and able to work in poultry processing so that the world is supplied with chicken and other great foods. You should also see that there are those of us who are not suited for such work, neither physically nor mentally.

My goal was merely to create a problem that was both challenging and fun for new PLC students. Has anyone tried to stop the conveyor before the 180 second timer reaches the kill zone? It might have a few surprises for some of you....

P.S. It is a rare day when I get to sit at a desk and write a program. I consider it a bonus when a new program comes up. I would almost work for free to be able to have the challenge of programming a PLC. I consider the writing of the program to be the bonus that makes all the other things bearable. I would like to be able to do more programming and less specifying, purchasing, contract writing, drawing, designing, calculating, trouble-shooting, consulting, and general customer hand-holding. I hope they build more chicken plants with PLC-controlled equipment, and I hope the remaining small plants in the US don't all move to another country.

Greg, you probably didn't know that I started this thread in the PRACTICE POSTING HERE section, not expecting it to be very popular, but still a place for those requesting a separate student section. Phil must have moved it over here to the main section, or does his computer move a thread automatically once it gets a certain number of hits?

Last edited by Lancie1; March 25th, 2005 at 02:29 AM.
  Reply With Quote
Old March 25th, 2005, 01:38 PM   #10
BarryL
Member
United States

BarryL is offline
 
Join Date: Mar 2005
Posts: 6
Lancie1

Quote:
My goal was merely to create a problem that was both challenging and fun for new PLC students. Has anyone tried to stop the conveyor before the 180 second timer reaches the kill zone? It might have a few surprises for some of you....
Thank you for taking the time to create this exercise. It should help others learn to debug a program.

I found the input to stop the conveyor, but I won't spoil the exercise for others.

Barry
  Reply With Quote
Old March 25th, 2005, 09:39 PM   #11
Lancie1
Lifetime Supporting Member
United States

Lancie1 is offline
 
Lancie1's Avatar
 
Join Date: Jul 2003
Location: Alabama
Posts: 10,002
Barry,

Congratulations on finding the Chicken Conveyor "off" button. Would you like to write a Student Challenge program of your own to submit here?
  Reply With Quote
Old March 25th, 2005, 09:56 PM   #12
elevmike
Member
United States

elevmike is offline
 
elevmike's Avatar
 
Join Date: Feb 2004
Location: Detroit, MI
Posts: 4,012
I have a funny suspesion that sombody is pulling our leg...
__________________
If you think you can do a thing or think you can't do a thing, you're probably right.... Henry Ford
  Reply With Quote
Old March 25th, 2005, 11:26 PM   #13
Lancie1
Lifetime Supporting Member
United States

Lancie1 is offline
 
Lancie1's Avatar
 
Join Date: Jul 2003
Location: Alabama
Posts: 10,002
That's okay, Mike. My legs grow longer every time they get pulled. Here is another little off-topic challenge for the electrical and maintenance types. It is a question on motor control wiring that I wrote years ago based on an actual event, too long except as an attachment.
Attached Files
File Type: doc Control-Article.doc (157.1 KB, 156 views)
  Reply With Quote
Old March 26th, 2005, 10:28 AM   #14
Terry Woods
Member
United States

Terry Woods is offline
 
Join Date: Apr 2002
Posts: 3,170
Can't help it... I love games...



There's an interesting side-effect in this design... at least in the Control Room...

Assuming that neither of the lights is burned out, this configuration presents some immediate diagnostic information just by watching how the lights behave. If we assume that the wiring is intact (this is a reasonable initial assumption) and that failures might occur in the devices only, then...

While the pump is off, the Red Light should be on... if not...

- Aux-2 is stuck open

If the Red Light is on, then, when pressing the Start Button in the Control Room, the Red Light should go off just after the Green Light comes on. If the Red Light stays on and the Green Light does not come on, then...

- there is a problem in one of the Stop Contacts or the Control Room Start Contact.

If both lights are on while holding the Start button, then...

- the mag might have tripped out (check the over-loads), or...
- the mag coil is burned out (verified if the over-loads are OK), or...
- the Aux-2 contact is fused closed (verified if the pump is running).

If, while holding the Start button, the Green Light is on and the Red Light is off (the mag-coil is working), and then, after releasing the Start button, the Green Light goes off and the Red Light goes on, then...

- Aux-1 has failed.


Only after performing the light-tests and then verifying that any suspected devices are not faulty should you consider that there might be a break in the wiring. Running down a broken wire is a pain in the a$$... and is also the least likely failure.
  Reply With Quote
Old March 26th, 2005, 09:59 PM   #15
Lancie1
Lifetime Supporting Member
United States

Lancie1 is offline
 
Lancie1's Avatar
 
Join Date: Jul 2003
Location: Alabama
Posts: 10,002
Good job, Terry. That is the way we wired the actual circuits.
  Reply With Quote
Reply
Jump to Live PLC Question and Answer Forum

Bookmarks


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Topics
Thread Thread Starter Forum Replies Last Post
Should You Be Registered To Post? CaseyK LIVE PLC Questions And Answers 66 April 12th, 2005 05:31 PM
Student question(s) rsdoran LIVE PLC Questions And Answers 2 November 14th, 2004 08:17 PM
Basic PLC Questions ToddMEstudent LIVE PLC Questions And Answers 8 October 14th, 2004 10:25 PM
Burny 3 Post Generator Need Help MSV3875 LIVE PLC Questions And Answers 3 September 11th, 2003 12:01 PM
Newcomers and learners are reticent to post Goody LIVE PLC Questions And Answers 31 September 8th, 2002 10:18 AM


All times are GMT -5. The time now is 07:49 AM.


.