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Thermal Overload
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?
Fortune
... But we've only fondled the surface of that subject.
-- Virginia Masters
-- Virginia Masters
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Can I use MVI56E without MVI56-XT?
New Replies:
Hello,
The MVI56E-XT is designed for the Logix-XT control platform, allowing it to operate in...
Problem with receive data form PLC to the buffer using C# or VB language.
XBTGT2110 and a TWDLCAA24DRF CPU that does not want to communicate
New Replies:
> The two most common causes for this are the use of a incorrect cable or the serial port...
from the Automation List department...
Profibus communication problem between Beckhoff IPC and Siemens PLCAn IPC connected to a Siemens PLC as a slave module. When I restart the PLC while IPC running then PLC can't find the IPC hardware on the Profibus network.
New Replies:
By Jeff Chang on 13 September, 2009 - 1:59 am -
Hi everybody,
I use IPC with Beckhoff Profibus cards and TwinCAT I/O software for communication...
Question about how to develop a software which is communicating on modbus/TCP
New Replies:
By M Griffin on 11 September, 2009 - 5:27 pm -
In reply to JonC:
I read your blog post, and it sounded interesting. How did you do the remote...
By JonC on 11 September, 2009 - 11:55 am -
Hey all,
Don't know if anyone is still working on this. I have written a great deal of code...
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...
from the PML or Modbus, one or the other department...
3710 ACM Power Measurement Electric Meter Modbus
Need modbus rtu card for 3710
Implemention of MODBUS application protocol specification
New Replies:
By M Griffin on 9 September, 2009 - 12:50 pm -
Your question is a bit ambiguous so I may not have interpreted your question correctly. However,...
Troubleshooting attempts to try and connect a Hitachi L200 inverter to a PC.
New Replies:
By Dan on 8 September, 2009 - 12:30 pm -
http://www.ctiautomation.net/PDF/Hitachi/Hitachi-SJ200-VFD-Drives.pdf...
I'm trying to access a microcontroller connected to a PC via a serial port
BM85S485 C Code to Read Data From Power Meter Via Modbus PORT
Would like to connect a TI545 with CLX over ethernet
New Replies:
By Scott Popiolek on 4 September, 2009 - 7:36 pm -
Go to the website
http://www.controltechnology.com/products/2500-communications_adapters/
...
By Fred Loveless on 4 September, 2009 - 9:24 am -
The best you are going to do is get a protocol converter or a bridging software.
Online...
Lost of Network Communication when using controllogix
New Replies:
Hi All,
Thank you for the reply.
The Redundancy System PLC 1 and PLC 2 is our Anode...
By Ken Roach on 3 September, 2009 - 4:52 pm -
Can you explain exactly what device or software package is displaying the "Communication...
By Russ K on 3 September, 2009 - 4:45 pm -
Just a thought... I have found that RJ45 connectors in use for multiple years sometimes exhibit...
Serial interface between Allen Bradley's Control Logix and Emerson Ovation DCS
New Replies:
Ann,
I have no specific experience with the problem as stated, but I suspect that the connection...
Hello MAKEVI
Can I use Ovation TCP/IP driver to get data from ovation DCS? Please any...
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...
By chud on 2 September, 2009 - 7:46 am -
Why on earth would you want this feature? this can be very dangerous. What if two people are...
By Schneider Italy on 1 September, 2009 - 8:31 am -
No it isn't. One user at a time. If another one tried to connect, Unity would advise that the PLC...
Possibility of Online PLCs back up from a central Server
i have 4 PLC 5/40
i have 4 PLC 5/40
Hi, can anybody help me please..? I need to do a connection Step 7 to Excel.
New Replies:
By Mustafa Al-mosawi on 3 September, 2009 - 11:01 am -
Firstly, I always ask - why are you interested in reading and writing from Excel? What is your...
If you are able to do some programming by your own you could use
...
By Kevin Grey on 2 September, 2009 - 4:18 pm -
Hi, Use a Kepware IO server this will talk to Excel and S7.
kevin...
Industrial Automation Company Survey for Academic project
New Replies:
By curt wuollet on 1 September, 2009 - 9:16 pm -
I might, but I don't have a company at the moment.
Regards
cww...
Connecting a rs485 4-wire to 232 converter. Third party device is 4-wire and my device is a 2-wire
New Replies:
You need to purchase a RS485 4-Wire to RS232 converter. Depending on your computer requirements you...
By Harvard on 29 August, 2009 - 10:12 am -
RS485 is 2 wire (plus a common reference) while RS422 is 4 wire (plus a common reference). Most...
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