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need to link two modbus master devices
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By Jerry Miille on 9 October, 2009 - 10:09 am -
You can use the MARC Omnii-Comm:
http://www.miille.com/din266-p00.pdf
for this type of...
has anyone a user manual for a landis and staefa central heating controller type RWB9 ?
INTERFACING SIEMENS S7 PLC WITH ABB AC800M + COMPACT HMI
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By Rob on 8 October, 2009 - 11:02 pm -
Yes, you can if you wish. No, you don't require any other methods.
I assume your S7-313C PLC...
4-20ma and loop powered
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By Rick Irvine on 1 October, 2009 - 7:54 pm -
Transmitters are called 4 wire or 2 wire. A 2 wire transmitter only has 2 wires connected to it. ...
If i send the command(010300210001, crc, crc) using serial port in VB.NET. I don't get any response.
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The tutorial actually is great and should answer all you questions but just to add...
Point 2.) ...
> 1.) You have got to set up the port - Port Number, Baud rate, start/stop bits, data bit,...
Unfortunately you are a long way off the mark.
1.) You have got to set up the port - Port...
I am a newbie also, maybe you are closing the port before info or string is read. vb has examples...
Coal flow where to start?
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By Ken Emmons Jr. on 1 October, 2009 - 8:35 am -
I assume you are talking about the small pellet sized coal in delivery tubing? Can you monitor the...
We need to talk to Crestron with a Beckhoff PLC, by using the Crestron read/write blocks
Proper selection of a online flow sensor for measurement of air flow in 3" pipe
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By Rohit Chandak on 30 September, 2009 - 1:19 pm -
Orifice Plate has been most standard instrument on such application but over the years engineers...
By Daniel M on 27 September, 2009 - 12:40 am -
If you need measure NORMAL m3/h, you can use Thermal Dispersion flow meters, or of course...
By Mark Thomas on 22 September, 2009 - 5:06 pm -
A Coriolis Mass flow meter would give you great measurement. I put together a sizing with you flow...
you can go for orifice type primary flow element. we can design orifice for you. if you want, we...
Error message in a VB PlugIn to browse devices in a Lonwork network
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By D. Fisher on 30 September, 2009 - 10:11 am -
Try going out to www.echelon.com/support and downloading and installing LonMaker 3.2 Service Pack...
measuring or detecting sugar level
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Hi,
If the sample is Homogeneous and you would like to measure Sugar Concentration. I suggest go...
How from a VBScript can I talk to an AB PLC5 using a Wonderware DAS Server(DASABTCP)?
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Thanks for your reply. I'll have a look on your suggestions....
Application involving high vibration and oil/dust contamination, choosing between using internal relay contacts, external electromechanical relays, or SRRs.
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By curt wuollet on 28 September, 2009 - 11:03 pm -
I'm right with you on the driving relays with relays issue. But I've seen it done in many places....
By M Griffin on 28 September, 2009 - 9:30 pm -
I assume that all your output loads are 120VAC. Given your concerns about reliability, I would...
Grass root project looking a cheap way of bringing groups of temperature signals that are in close proximity into a DCS
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By David on 28 September, 2009 - 7:10 pm -
HART is an FSK signal superimposed onto a 4-20mA signal from a field transmitter. The HART signal...
>> groups of temperature signals <<
> I would think that you mean thermocouple...
The Emerson FFB 848T is a possible solution for this type of application and a good one. I use them...
I tend to agree with David, I suspect that you are dealing only with temperature elements, please...
I am facing some problem in converting DeltaV DCS graphics into OSISofts PI ProcessBook Graphics
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I've used GrITS for converting Bailey to PI graphics but not DeltaV. The support is very good. I...
How to measure the oil level on seawater in a specific area?
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By Jason on 25 September, 2009 - 7:42 am -
We have several 'Leakwise' units installed.
We use them for trace level detection, I cannot tell...
Problem found in measures with passive magnetic sensors in a over-speed trip system.
Would appreciate recommendations for batch controllers for fuel loading
Clone to new OS with new hardware or Clone to new hardware with same OS?
Quick panel to 1747-SN
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Thank you for your feed back
But can I buy a converter which has rs485 to Remote IO protocol...
Can any body tell me the minimum level of wattage of signal to ignite the hydrocarbon atm?
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It is the amount of energy available to the fuel mix thats important and that can be delivered not...
I am looking at using this sensor.
from the application, engineering, automation department...
Interfacing Siemens S7-300 cpu 313C with ABB's compact HMI scadaHow to interface the Siemens S7-300 cpu 313C with ABB's Compact HMI SCADA?
Some technologies have been in development for years, but only a few enjoy commercial success.
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By M Griffin on 23 September, 2009 - 4:24 am -
If I knew the answer to all that for sure, then in 3 to 5 years I would probably be pretty rich. I...
A question that has been on my mind for some time...
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By Edwin on 22 September, 2009 - 1:08 am -
Its very bad that companies charging for their own software. There are Companies like Baldor will...
How easy is Active Factory to use for Excel reports?
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By Trevor Ousey on 21 September, 2009 - 6:23 pm -
I have used the original ActiveFactory made by Dataworks and now Incuity. Not sure if you are...
I have a S7 PLC network with PROFIBUS protocol. There are WinCC HMI PC. How to integrate additional field devices by extending PROFIBUS
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By dilip on 21 September, 2009 - 1:42 pm -
David and Rich,
Thanks for your contributions and support. In fact I have now obtained GSD file...
I have no idea how to determine the Modbus RTU Framing times.
WFI Temp Control with Free-Cooling and Chilled Water
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By Dick Compton on 21 September, 2009 - 10:32 am -
I am not sure if I understand.
I did a chilled vs cool city water dual mixing valve application...
clarifications regarding the determination of beta value for orifice meter
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By D.N.Sharma on 21 September, 2009 - 7:43 am -
Beta selection depends on many factors and is to be decided carefully. I will help you in your...
By Bagan on 21 September, 2009 - 1:22 am -
Sarthi,
The Beta Ratio is needs to be calculated for Only Orfice Meter
Beta Ratio = Orifice...
GT Trip on IGV control trouble
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By VASANTH on 20 September, 2009 - 12:35 am -
please check diagnostic alarm regarding voting miss match (TCQA /TBCA CARD ERROR), and IGV...
xp with modsoft 2.61
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ok thanks for direct IO i will try it.
my computer turn on in dos mode. and its very bad way to...
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