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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
Pecor's Health-Food Principle:
Never eat rutabaga on any day of the week that has a "y" in
it.
Never eat rutabaga on any day of the week that has a "y" in
it.
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Trying to talk to Contrologix processor via a network.
New Replies:
By Trevor Ousey on 23 May, 2009 - 6:15 am -
Hi Job,
Be sure you have the right subnet mask and ip addresses. Also check that the firmware is...
After some network fails, some Allen Bradley PLCs connected to the network lost Ethernet communication.
New Replies:
By Russ on 21 May, 2009 - 1:10 pm -
I've seen a similar condition in a plant here in AZ. We tracked it down to having too many MSG...
Is it possible to convert Modbus via TCP into Modbus TCP?
New Replies:
By Sushant Chanana on 20 May, 2009 - 11:06 pm -
Hello Salman,
As far as my knowledge is concerned,
modus is logical layer of communiation where...
Serial interface between Allen Bradley's Control Logix and Emerson Ovation DCS
clear definition on some of the control words used in setting up the MSTR function with TCP/IP
New Replies:
By Miguel Lage on 13 May, 2009 - 10:46 am -
>40000x+4 = quantum backplane slot id
Remember that the slot id is on the More significative...
Question about connection MVI56-Kepserver-WinCC
New Replies:
By Erik Syme on 12 May, 2009 - 8:13 pm -
The module would be setup as a Modbus Slave to the Kepware running the modbus master driver. The...
By alekos on 11 May, 2009 - 2:38 pm -
The problem is that from technical support from prosoft I received answer:
"You could...
By Fred Loveless on 11 May, 2009 - 9:59 am -
The MV156-MCM does modbus so you would use the Modbus Suite from Kepware to talk to it.
Fred...
Question about how to develop a software which is communicating on modbus/TCP
New Replies:
Hi Tommy,
Im looking to do the same thing, so, I was checking your code...
Do you have...
Looking for a good multi-master CAN-based technology with lots of devices suitable for building automation applications.
New Replies:
By Steinhoff on 11 May, 2009 - 2:38 pm -
Hello,
for an open source project I would use CAN festival ....
http://www.canfestival.org
...
Thank you very much for your response.
Lonworks is too expensive to work with for an open source...
By M Griffin on 11 May, 2009 - 12:18 am -
Devicenet is not an open standard. It's controlled by the ODVA, which is a closed club led by AB...
Communication error
New Replies:
By Pedro on 11 May, 2009 - 9:23 am -
Silly question, but are you sure the YEW vortex is a Hart instrument and not their Brain protocol??...
When I connect the Comm box up in series on the negative terminal to the power supply, there is a...
Yes, 250ohm resistor should be hooked up.
if you didn't connect it, then the reason why it...
By James on 7 May, 2009 - 11:02 pm -
If it anything like the HART modem, you'll need to use a 250ohm resistor in series and hook up the...
Testing a Modbus master using RTU over TCP
New Replies:
By A K Jha on 11 May, 2009 - 6:55 am -
Hi
Pls. visit the site http://www.simplymodbus.ca/ . There I hope you will find the test...
By CH on 23 April, 2009 - 10:08 am -
As a previous post states above, the simulator from Calta (Mdbus) does support RTU over TCP. Based...
I know of no such thing as a Modbus RTU over TCP slave simulator. A Modbus RTU slave is a serial...
identifying the cause of an intermittent PLC communication loss
New Replies:
By siopaoAsado on 10 May, 2009 - 8:32 pm -
We are experiencing the same problem. However, what we have are siemens s7-400 PLCs connected...
I need really short/quick access to a PLC-5...
connecting four Serial devices to one PLC
mark-IV printer replacement
New Replies:
By Bagan on 9 May, 2009 - 2:19 am -
Sorry for the delay
Baud : 2400
Parity: EVEN
Data Bits: 7
Stop :1
Flow Control : None
...
Best way to communicate with a WAGO device from Matlab? (Considering OPC server vs. TCP connection + .dll)
New Replies:
By Mark on 7 May, 2009 - 1:05 pm -
Automated Solutions offers several off-the-shelf Modbus connectivity solutions (ActiveX Controls,...
A Twitter feed of new post titles is now available.
from the UFOP department...
Why do we need terminators in fieldbuses? How many of them per segment? Do we also need terminators for all the spurs?What is the correct usage of the resistive terminators in networks? What is it for?
New Replies:
By Russ Kinner on 6 May, 2009 - 3:37 pm -
If you can afford buying an old copy of my instructor's book, do so. You can find some offered at...
By Russ Kinner on 6 May, 2009 - 3:19 pm -
A good starting point is the wikpedia entry:
http://en.wikipedia.org/wiki/Transmission_line
...
By Felipe on 6 May, 2009 - 9:11 am -
Right, pvb, I appreciate your help. I got the point over the reflections on a barrier, but what...
By pvb on 6 May, 2009 - 12:53 am -
The electric cable has a impedance. If there is no resistance with that value at the end of the...
need compact flash help
New Replies:
By James Ingraham on 4 May, 2009 - 11:10 am -
Take a look at this document, entitled "Logix5000 Controllers Controller Nonvolatile...
By Roy Matson on 4 May, 2009 - 10:52 am -
I recently had a problem trying to get a compact flash working with ABs VersaView and ended up...
Need help for networking knowledge
New Replies:
By Dick Caro on 1 May, 2009 - 1:48 pm -
You asked. Please consider purchasing my book "Automation Network Selection" from ISA. It...
By James Ingraham on 1 May, 2009 - 10:53 am -
Well, this is a big can of worms.
Just to ask, why does a mechanical engineer need to know how...
Control Logic Communicating with CAN Buss
letting public users to monitor my data from the Omron PLC with Internet using browser
New Replies:
By M Griffin on 28 April, 2009 - 8:12 pm -
Trying to describe all the possible problems and solutions is impossible, so I won't even attempt...
Thanks very much for your reply, tomorrow I will have a meeting with the Omron Manager in my...
By M Griffin on 28 April, 2009 - 2:03 am -
You need to start with figuring out what it is you want to do. It sounds as if you just want to...
Using a usb-arcnet coax to connect a notebook with TCI to a mark V
New Replies:
Hi Marco,
all information you can give me are
appreciated.
Best Regards,
Luca C.
...
Hi Luca C.,
i will try (in one of the upcoming weeks) to connect to mark-V(LM) via a...
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