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 > Search Forums

Showing results 1 to 25 of 500
Search took 0.10 seconds.
Search: Posts Made By: Allen Nelson
Forum: LIVE PLC Questions And Answers February 8th, 2005, 08:15 PM
Replies: 858
Views: 150,443
Posted By Allen Nelson
It's not what you think.

No, it don't gotta.

Once, I delivered a PDP-11 to a nuke plant. They used their backup and needed a "new" backup. This was about 10 years ago.

About 5 years ago, for Y2K, I upgraded a DMACS...
Forum: LIVE PLC Questions And Answers February 8th, 2005, 02:55 PM
Replies: 7
Views: 3,211
Posted By Allen Nelson
I haven't found one yet. The problem is that...

I haven't found one yet.

The problem is that when you select multiple rungs, RSL5K copies them to the clipboard in Neutral Text mode ("XIC(Bit1)OTE(Bit2)") instead of the SLC-friendly ASCII mode....
Forum: LIVE PLC Questions And Answers February 8th, 2005, 12:39 PM
Replies: 102
Views: 10,266
Posted By Allen Nelson
This reminds me of a joke my kids are fond of: ...

This reminds me of a joke my kids are fond of:

How you get down off an elephant?

You don't. You get down off a duck.



So it's not "How many kilograms do I weigh?", but "How many...
Forum: LIVE PLC Questions And Answers February 8th, 2005, 11:51 AM
Replies: 102
Views: 10,266
Posted By Allen Nelson
Mass and weight

Peter:

Don't think that, simply because no one responds, it means that no one knows. Looks like several of us know. I got beaten TWICE!

Maybe.

Part of the confusion comes from the language...
Forum: LIVE PLC Questions And Answers February 6th, 2005, 04:48 PM
Replies: 3
Views: 1,506
Posted By Allen Nelson
Documentation - the other half of my job.

There's really only ONE important piece of documentation that MUST be part of any project.

The Purchase Order.

Without it, nothing gets done.




If there is going to be a second important...
Forum: LIVE PLC Questions And Answers February 6th, 2005, 07:30 AM
Replies: 5
Views: 1,897
Posted By Allen Nelson
Time out

Keep in mind that the CLX doesn't calculate the day-of-the-week (DOW), it only keeps track of the current day.

So your logic is going to depend on whether or not the PLC is ON when you see a...
Forum: LIVE PLC Questions And Answers February 4th, 2005, 04:40 PM
Replies: 8
Views: 3,012
Posted By Allen Nelson
Part 11 - part II

Yes, everyone has their own interpretations.

Part of that is a fallout of the Y2K thing. Companies spent oodles of money on "compliance" that they realised that they didn't need. So each phara...
Forum: LIVE PLC Questions And Answers February 4th, 2005, 02:50 PM
Replies: 2
Views: 1,154
Posted By Allen Nelson
Re: I would like some constructive criticism

We're usually all too happy to tell someone what they've done wrong!

To post your code, first you have to register. Then the box at the bottom of the page will show:

[attachment]


Next,...
Forum: LIVE PLC Questions And Answers February 4th, 2005, 10:55 AM
Replies: 22
Views: 12,484
Posted By Allen Nelson
Oopps

I stand corrected.


(http://www.plcs.net/qanda/showthread.php?t=12062)
Forum: LIVE PLC Questions And Answers February 4th, 2005, 09:10 AM
Replies: 22
Views: 12,484
Posted By Allen Nelson
Trouble ahead.

Casey's not going to like it.

There's no way to post a poll!
Forum: LIVE PLC Questions And Answers February 4th, 2005, 07:24 AM
Replies: 22
Views: 12,484
Posted By Allen Nelson
One tweek

The default image of "No Avatar Selected" on the main home page doesn't exist, and produces an image link error.
Forum: LIVE PLC Questions And Answers February 3rd, 2005, 03:56 AM
Replies: 12
Views: 5,070
Posted By Allen Nelson
Sadly, Rockwell is up to 3.81 now, I think the...

Sadly, Rockwell is up to 3.81 now, I think the file should have uploaded properly. If you post it, someone with 3.81 can try openning it, at least to see if that is indeed the problem
Forum: LIVE PLC Questions And Answers February 3rd, 2005, 01:43 AM
Replies: 19
Views: 2,534
Posted By Allen Nelson
Vote #1 in favor.

This is a superb lesson idea. Don't ever drop it.

Whenever you are faced with being a stranger to a piece of code, it takes a while to figure out what the <deleted> the programmer was thinking.
...
Forum: LIVE PLC Questions And Answers February 3rd, 2005, 01:29 AM
Replies: 12
Views: 5,070
Posted By Allen Nelson
All is not lost. Only money is....

The applicaton on the Panelview was created with version 3.8.x. Your "old" version of PB32 doesn't recognize the format changes. You need to upgrade your PanelBuilder.
Forum: LIVE PLC Questions And Answers February 2nd, 2005, 08:44 PM
Replies: 6
Views: 3,699
Posted By Allen Nelson
This doesn't sound that hard.... Am I missing something?

How is the first datalink getting its data - the PLC or an iFix tag?

Either way, use the source to do the trapping.

If it's via a data entry field, then edit the VBA of that object to include...
Forum: LIVE PLC Questions And Answers February 2nd, 2005, 08:03 AM
Replies: 7
Views: 11,439
Posted By Allen Nelson
Best guess.

The only way that an old program can "suddenly reappear" is if the PLC loaded it from an EEPROM.

The only way that it will load it from an EEPROM is on powerup, or a memory error.

So either the...
Forum: LIVE PLC Questions And Answers February 1st, 2005, 12:42 PM
Replies: 2
Views: 4,101
Posted By Allen Nelson
You mean like "Secure on Idle"

There's a checkbox on the Security configuration (Menu | Application | Security) for "Secure on Idle".

Per the help file:


Is this what you are looking for?
Forum: LIVE PLC Questions And Answers February 1st, 2005, 09:16 AM
Replies: 5
Views: 1,343
Posted By Allen Nelson
Two pieces of advice:

1) Know your instruction set.
2) Organize you data.
Forum: LIVE PLC Questions And Answers January 30th, 2005, 09:03 AM
Replies: 16
Views: 2,271
Posted By Allen Nelson
Why wait until Tues? Draw the code you have...

Why wait until Tues?

Draw the code you have come up with, between the text and and we'll be able to tell you if what you have will work or not.

Using those pseudo-HTML tags, you code will...
Forum: LIVE PLC Questions And Answers January 28th, 2005, 03:04 PM
Replies: 5
Views: 6,015
Posted By Allen Nelson
Much has been made of how ControlLogix input...

Much has been made of how ControlLogix input tables are updated asynchonous to scan. It's funny, but it really doesn't play much of a roll.

The question that you must be able to answer is: How...
Forum: LIVE PLC Questions And Answers January 28th, 2005, 05:30 AM
Replies: 10
Views: 2,020
Posted By Allen Nelson
If there is NO feedback, you can't have an alarm....

If there is NO feedback, you can't have an alarm. There's nothing to compare the theoretical state of the motor to.

If there is feedback from the motor, but you are simply no longer driving the...
Forum: LIVE PLC Questions And Answers January 27th, 2005, 11:58 PM
Replies: 11
Views: 1,616
Posted By Allen Nelson
If he wants it, I say let him have it.

Rocket:

Welcome

I'm glad you appreciate our sense of humor. I posted traffic light code HERE (http://www.plctalk.net/qanda/showthread.php?postid=1107#post1107) quite some time ago. For some...
Forum: LIVE PLC Questions And Answers January 27th, 2005, 11:54 PM
Replies: 3
Views: 5,761
Posted By Allen Nelson
To me, it sounds more like they want you to...

To me, it sounds more like they want you to explore the One-Shot instruction.

The thing that trips up most students on this part of the exercise is that the DO manage to cause the door to stop...
Forum: LIVE PLC Questions And Answers January 26th, 2005, 08:26 AM
Replies: 13
Views: 1,542
Posted By Allen Nelson
Herrs.

It's a bit out of your way, but the Herr's Potato Chip Factory, on the PA/MA/DE border has public tours. http://www.herrs.com/tour/tour.htm

I've never been to them, but they're popular with the...
Forum: LIVE PLC Questions And Answers January 25th, 2005, 03:37 PM
Replies: 61
Views: 7,370
Posted By Allen Nelson
More than one way.....

Me, I cheated. :D

[attachment]

Just don't ask what happens when a light bulb burns out....
Showing results 1 to 25 of 500

 
Forum Jump

All times are GMT -5. The time now is 01:15 AM.


.