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The threads that wouldn't die...
- PC reliability?
- Windows, real time
- PID loops
- PCs vs. PLCs
- Replacing people
- MS 'monopoly'?
- Software quality
- Where do we go from here?
- Why pay?
- PC reliability?
- Windows, real time
- PID loops
- PCs vs. PLCs
- Replacing people
- MS 'monopoly'?
- Software quality
- Where do we go from here?
- Why pay?
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Log data from serial ports.
New Replies:
By M Griffin on 10 September, 2009 - 11:58 pm -
As for manipulating the Modbus packets, that is what the links to libmodbus and pvbrowser were for....
I justed wanted to post the code that I have so far and get some feedback. Go easy on me, I am not...
Thank you for the link.
I implemented this process and it is working fine. But now I am trying...
I made a mistake on the link. Try this one...
http://scadametrics.com/blog/?p=22
...
Glad that my solution was helpful, Vaneeth.
My snooper program was written in C and compiled in...
By Harvard on 7 September, 2009 - 12:42 pm -
A variation of this is to "diode auctioneer" the two RS232 TxDs into one Com Port and...
Funny, I actually thought of doing that but never got to making the cables. Now that I know it...
By M Griffin on 6 September, 2009 - 10:50 pm -
For examples of Modbus communications, you might want to look at the following:
This is a C...
Vaneeth,
I did something like this once, but with a twist that may make your job easier.
In...
By Vineeth on 6 September, 2009 - 3:31 pm -
I am gonna take your suggestions and implement this.
I don't know python at all only C and C++....
Using our open source project
http://pvbrowser.org
it should be possible to do.
Within our...
By M Griffin on 5 September, 2009 - 10:24 pm -
To make your program asynchronous, you just have to make sure that nothing in your program halts in...
Thank you for answering Griffin.
I plan to make my program work in only one mode at a time. So...
By M Griffin on 4 September, 2009 - 8:29 pm -
I think you would need to do something like this:
1) Detect the start of the message and reset...
Any information on RS485booster,
New Replies:
By Harvard on 10 September, 2009 - 11:21 am -
If you are not in need of multidrops I would use a Black Box ME794 Micro Driver which is good for...
Version control software for ControlLogix ladder
New Replies:
By George Grecu on 10 September, 2009 - 9:19 am -
I am also interested to implement such versioning control system. Did you have any luck? Could you...
SAT250 support for Token ring version.
New Replies:
By jamal on 8 September, 2009 - 9:41 pm -
SAT 250 is Unix x86/Sun platform, SAT 250 SCALA is Windows platform. Which version you are using?...
Simplex Fire Alarm System 4100U Programming Software.
New Replies:
By Ray Mack on 8 September, 2009 - 5:56 pm -
12.01.06 was written for a USB dongle. You can still use the old dongle. However, you need to...
Vijeo Designer 5.0 installation error showing error 1324.
I want to understand whether it makes sense to convert to a report by exception basis in PLCs and whether it is even possible?
New Replies:
By M Griffin on 7 September, 2009 - 1:07 pm -
From what I remember about DF1, if you get rid of the AQ/NAQ then you have the same cycle as...
Mcafone,
This doesn't really answer your question, but FWIW... If your AB processors and RsLinx...
By M Griffin on 6 September, 2009 - 11:19 pm -
Yes, it is possible to use one bit as a flag to indicate that data has changed since the last poll....
I am also originally from an industry where update times are a little more critical (industrial...
You are welcomed G Brown,
I only wish that I could be of more help to you.
But Industrial...
I just wanted to thank you Ashraf and M Griffin for your responses. ...
By M Griffin on 4 September, 2009 - 12:37 am -
As another person has mentioned, there is only so much performance you can squeeze out of a 1200...
There is nothing much which you can squeeze out of 1200bps. This is a very low bandwidth, and it is...
Ok, Maybe I come from an environment of complexity, because we would never send back all the analog...
I know everyone has their personal preferences, but I think it would be more interesting to discover which software is the worst...
New Replies:
By Harry on 7 September, 2009 - 11:00 am -
I have over 8 years experience with PARAGON. I am specialized in Fermentation and Bioreactor...
AB 6200 SLC500 Software
New Replies:
By Trevor Ousey on 7 September, 2009 - 7:55 am -
Hi,
Do you mean APS for the SLC5, as 6200 was for the PLC5 from memory?
If it is APS, the...
Sizing of control system for distillation project.
New Replies:
By Y.K.JARIWALA on 7 September, 2009 - 6:58 am -
WE can help you in column design [process design] with instrumentation & control loops
...
I have zero experience with petrochemical applications but, it should be basically the same as any...
how to convert hex to floating point number?
New Replies:
By Saeid Yousefpour on 6 September, 2009 - 3:21 pm -
Thank you Bruce. it works very good....
Hi, There are a lot of examples and information about floating point number's.
I have created a...
I suppose the format is IEEE_754-1985
...
By M Griffin on 5 September, 2009 - 10:56 pm -
That is a single precision floating point number in "big-endian" (network order) byte...
By Bruce Durdle on 5 September, 2009 - 9:12 pm -
It looks as if the value is encoded in IEEE 32-bit floating-point format.
The first bit is a...
Are there software applications on the market that can compile and test Honeywell CL (control language) programs.
New Replies:
By SD on 6 September, 2009 - 2:21 am -
> Take a look at CL Check at http://www.sandiforduk.com <
This link is not available. Can...
How to communicate with Allen Bradley PLC and SysDev M4500 S4516-DF1 card?
New Replies:
Anybody have experience with Sysdev (Sysetm Electronics Associates or Sysetm Electronics Group)...
We are facing problem while downloading tag number details on line in Experion PKS DCS.
New Replies:
By Peter on 4 September, 2009 - 4:54 am -
I just wanted to add my 10 cents worth on this issue. First of all your server really needs to be...
Need to extract historical data from the DAT file into CSV or Excel to create reports.
New Replies:
By Mustafa Al-mosawi on 3 September, 2009 - 5:25 pm -
You could easily create reports directly from your RSLinx OPC Server with Matrikon Analytics Excel...
By kevin grey on 3 September, 2009 - 3:35 pm -
Hi,
it would be better to set data logging to use the ODBC then the data can be read out of the...
Need information on the Unity's connectivity
New Replies:
The answer is NO. ONLY ONE USER AT A TIME!!
Also, I wonder how could somone be in 2 places at...
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