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 - Interactive Q & A > - Interactive Q & A > LIVE PLC Questions And Answers

PLC training tools sale

Thread Tools Display Modes
Old November 4th, 2009, 11:55 AM   #1
United States

ChrisOfMaryland is offline
Join Date: Nov 2009
Location: Maryland
Posts: 11
Structured Text for automating experiments? I'm new...

Hi, everybody, I just joined and this is my first post.
I want to program Rockwell ControlLogix controllers to automate experiments, some of them long term, some of them on the factory floor. I would like to use Structured Text for as much of this as is practical.
I'm a scientist and already do programming in a few different text languages. Of course the choice of language is partly a matter of personal taste. Mine runs strongly towards text. I don't know yet how practical a fit this will be for PLCs and automated experiments.
PCs were great for this years ago, but they keep getting messier, less like personal computing engines and more like office equipment. A PC running FORTH or C on an 80286 processor under DOS used to be easy and fairly reliable, but those days are gone. This year I used LabVIEW & Windows for a big project and it was just a mess.
I also used relay ladder logic in the early 1970's, and it was a lot of work, not a pleasant way to program. They tell me it is better today, and I will probably try it and possibly like it.
We have engineers here already using ControlLogix, so I have a borrowed Logix5563 in a rack, and an RSLogix 5000 license, and my first structured text program now reads a photodiode voltage, flips two DC outputs depending on its level, and formats a string message including the voltage. So far, so good.
I'm going to post another question about reference books and documents for Structured Text.
What advice can you give me?
Is there anything about what I want to do that sounds dumb?
Somewhere months ago, before I got into this, I heard something somewhere about scientists adopting PLCs and Structured Text. I wish I was in contact with them, if they exist. Anybody heard of this?
And, I've also heard that I should be looking at embedded computing rather than PLCs, but I didn't get much more than that. Can anybody comment?
Thanks to anybody who felt like reading all this!
  Reply With Quote
Old November 4th, 2009, 12:40 PM   #2
Lifetime Supporting Member + Moderator

JesperMP is offline
JesperMP's Avatar
Join Date: Feb 2003
Location: Copenhagen.
Posts: 13,442
Structured Text is great for math computing and mass data manipulation.
ST can also be used for programming sequences, but is more cumbersome for this purpose than the other languages that are available for you in the CLX PLC.
I say go ahead, but look into learning how to use the other languages as well.
3 strikes and you're out
  Reply With Quote
Jump to Live PLC Question and Answer Forum


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
PLC5 Structured Text Kmitch LIVE PLC Questions And Answers 4 April 17th, 2009 04:45 PM
Structured text - Getting started nettogrisen LIVE PLC Questions And Answers 3 July 12th, 2007 11:00 AM
GE RX3i Structured Text infineum LIVE PLC Questions And Answers 0 January 3rd, 2007 11:43 PM
IEC 61131 Structured Text syntax Paulus LIVE PLC Questions And Answers 2 April 22nd, 2005 09:11 AM
Documentation on Structured Text cmulder LIVE PLC Questions And Answers 13 June 11th, 2003 11:10 AM

All times are GMT -5. The time now is 12:52 AM.