Control.com - Nerds in Control
I am a graduate student-lurker in this list. I am working on a college lab automation project, where I need to control some processes using a PLC, and web-enable them...
Hello LinuxPLC members,
I have been brushing up on my C and in the end of the week, I came
across GTK+.
I have been brushing up on my C and in the end of the week, I came
across GTK+.
New Replies:
By Ron G Ricci on 24 July, 2001 - 1:19 pm -
Any graphics toolkit, such as GTK+, would be a plus in such a project. However, there will still be...
I was out of town for some days (and off-line). I wanted the group to know
that I am still working on the big-demo project.
that I am still working on the big-demo project.
New Replies:
By Juan Carlos Orozco on 21 July, 2001 - 12:56 pm -
The Graphical HMI is now on the cvs. The new directories are as follows /mmi/hmi_gtk/ (For...
By Juan Carlos Orozco on 20 July, 2001 - 3:45 pm -
Rick Jafrate wrote: > > Juan, > > I am interested in your graphical HMI. I would like...
By Rick Jafrate on 20 July, 2001 - 11:31 am -
Juan, I am interested in your graphical HMI. I would like to use it in a demo project I am trying...
By Juan Carlos Orozco on 19 July, 2001 - 9:19 am -
Mario de Sousa wrote: > Juan Carlos Orozco wrote: > > ... > > By the way, could...
By Mario de Sousa on 18 July, 2001 - 8:08 pm -
Juan Carlos Orozco wrote: > > I was out of town for some days (and off-line). I wanted the...
I am in urgent need or raising a Square D PLC from the dead. ... may need to write drivers ... Can Linux be used?
New Replies:
By Mark Woudenberg on 21 July, 2001 - 2:21 am -
The documentation for the Synet communication is still available round hear if your interested. ...
> > Next algorithm is the totalizer block.
If you could please explain what it is exactly that you want the totalizer to do, I'll probably implement it right away.
If you could please explain what it is exactly that you want the totalizer to do, I'll probably implement it right away.
New Replies:
By Jiri Baum on 20 July, 2001 - 5:22 pm -
johan.bengtsson: > Having error multiplied by gain is somewhat missleading however since the...
By Mario de Sousa on 20 July, 2001 - 4:05 pm -
Jiri Baum wrote: > > johan.bengtsson: > > That is right (apart from some misstyping...
By Johan Bengtsson on 20 July, 2001 - 4:04 pm -
yes it is, normally you have three parameters in to a PID that is changed during tuning gain Itime...
By Jiri Baum on 19 July, 2001 - 10:59 am -
johan.bengtsson: > That is right (apart from some misstyping :-) ) Yeah, sorry about that......
By Johan Bengtsson on 19 July, 2001 - 10:05 am -
That is right (apart from some misstyping :-) ) The Igain and Dgain should still be calculated as...
By Mario de Sousa on 19 July, 2001 - 9:45 am -
Hey guys, Sorry for not jumping in on the thread, but I don't have time to look into this at the...
By Jiri Baum on 19 July, 2001 - 9:44 am -
I wrote: > I += (error - last_error) * Dgain / time Sorry about the typo. D += (error...
By Jiri Baum on 19 July, 2001 - 9:21 am -
johan.bengtsson: > There is one other slight drawback, this requires constant time between >...
I am going through the programs and will take some time to understand the total program. ...
New Replies:
By Jiri Baum on 20 July, 2001 - 5:21 pm -
johan.bengtsson: > But I do care, not really how it is implemented exactly but how it is to >...
By Johan Bengtsson on 20 July, 2001 - 4:06 pm -
But I do care, not really how it is implemented exactly but how it is to be tuned. There should be...
By Arthur Mayclin on 19 July, 2001 - 11:43 pm -
Think of it this way: The proportional term (or gain) is the driving force. It causes your output...
By Masahiro Kazahaya on 19 July, 2001 - 1:14 pm -
Dear Rufus: I shall try to answer your questions as much as I know. 1. Each PLC or DCS...
By Jiri Baum on 19 July, 2001 - 1:11 pm -
johan.bengtsson: > So much for that, the one to use is ideal if it is only one of them, >...
By Johan Bengtsson on 19 July, 2001 - 10:57 am -
Well, I have just finished a *LONG* discussion there, and introducing a new one right now would not...
By Johan Bengtsson on 19 July, 2001 - 10:30 am -
So basically: at startup you start with just P and then turn on I (and possibly D) Does this happen...
By RufusVS on 19 July, 2001 - 10:08 am -
When one considers the ubiquity of PID loops in process control and motion control, it seems...
By Anand on 19 July, 2001 - 10:07 am -
dead time is basically supposed to act agains the lag to a force applied. There are several...
By Johan Bengtsson on 19 July, 2001 - 9:45 am -
good point /Johan Bengtsson ---------------------------------------- P&L, Innovation in...
By Ken Irving on 18 July, 2001 - 8:13 pm -
On Wed, Jul 18, 2001 at 10:58:28AM -0600, Johan Bengtsson wrote: > ... > > A side note...
A piece from the authors imagination....
New Replies:
By Jiri Baum on 20 July, 2001 - 4:46 pm -
johan.bengtsson: > and no for a time based equation should m=S/T, that means k=1-S/T, not >...
By Johan Bengtsson on 20 July, 2001 - 4:43 pm -
Ok, I learned something new today. I have always dealt with timesteps that is rather small and my...
By Jiri Baum on 20 July, 2001 - 11:27 am -
johan.bengtsson: > why not at two a clock? I have done this a lot of times and could do it >...
By Johan Bengtsson on 20 July, 2001 - 11:18 am -
Well Y = (PV * (1-k)) + (Y * k) and Y=Y+(PV-Y)*p will give you exactly the same result for p =...
By Johan Bengtsson on 20 July, 2001 - 11:18 am -
why not at two a clock? I have done this a lot of times and could do it when I am asleep... ...
By Ken Irving on 20 July, 2001 - 11:16 am -
On Fri, Jul 20, 2001 at 01:26:49PM +1000, Jiri Baum wrote: > > There are many PV ( low-pass)...
By Mario de Sousa on 20 July, 2001 - 11:15 am -
Jiri Baum wrote: > > Gilles: > > There are many PV ( low-pass) filters available in...
By Jiri Baum on 20 July, 2001 - 11:12 am -
Gilles: > There are many PV ( low-pass) filters available in PID controllers. Here > is one: ...
By Gilles Allard on 20 July, 2001 - 10:25 am -
There are many PV ( low-pass) filters available in PID controllers. Here is one: Y = (PV * (1-k))...
By Jiri Baum on 19 July, 2001 - 12:05 pm -
Anand: > And folks, tell you what! > A New PLC puts in a small logic for reducing the noise....
There is an article in this month's Industrial Computing magazine about Open Source in control and automation.
New Replies:
By Juan Carlos Orozco on 20 July, 2001 - 3:44 pm -
Jiri Baum wrote: > > Mario: > > Jiri: It seems that soon we will be needing top level...
By Jiri Baum on 20 July, 2001 - 3:43 pm -
I wrote: > Any reason why they should be completely separate? P.S.: if they're completely...
By Jiri Baum on 20 July, 2001 - 3:09 pm -
Mario: > Jiri: It seems that soon we will be needing top level directories in the > cvs... ...
By Curt Wuollet on 20 July, 2001 - 3:07 pm -
Yes, it would. I'm not sure what the deal is with this but they have been invited. Perhaps there...
By Mario de Sousa on 20 July, 2001 - 11:30 am -
Juan and Greg: It seems Juan is starting to write the beginnings of a SCADA. Greg seems to be...
By Curt Wuollet on 19 July, 2001 - 3:48 pm -
Hi Greg Thanks for the article and the pointer. Too bad the leadtime didn't allow for the changes....
Is anyone working on a relay ladder editor or is there a way to
produce a ladder diagram listing?
produce a ladder diagram listing?
New Replies:
By Jiri Baum on 20 July, 2001 - 7:24 am -
Rick: > Is anyone working on a relay ladder editor or is there a way to produce a > ladder...
Curt Wuollet wrote on the Automation list:Curt Wuollet wrote on the Automation list:
> But something like Labview, sharing a map with an embedded PLC would be
> powerful medicine for a lot of solutions not served well by either alone.
What features would we want in such a language?
> But something like Labview, sharing a map with an embedded PLC would be
> powerful medicine for a lot of solutions not served well by either alone.
What features would we want in such a language?
New Replies:
By Curt Wuollet on 19 July, 2001 - 10:37 pm -
Hi Jiri I was thinking somewhat conceptually about the combination of procedural or even graphical...
How to make additions to the CVS
Your use of this site is subject to the terms and conditions set forth under Legal Notices and the Privacy Policy. Please read those terms and conditions carefully. Subject to the rights expressly reserved to others under Legal Notices, the content of this site and the compilation thereof is © 1999-2010 Nerds in Control, LLC. All rights reserved.
Users of this site are benefiting from open source technologies, including PHP, MySQL and Apache. Be happy.
Fortune
There are very few personal problems that cannot be solved through a
suitable application of high explosives.
