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Help with pvbrowser
May 16, 2008 9:20 pm, by Gopalakrishnan.N
Subject : HMI
 from the Automation List dept.
Text :
Hi,
I am developing an project where I am logging all power parameters of machines on a factory floor. I have to log and display the data. I was on the verge of developing my own application using VB but stumbled upon this software. Since I may have to scale up this projects to include more factory floor, I have decided to build my app using this software.
But the problem is there is no starting point or some tutorial to start with. Also I would like to know my data is in simple data format, not in Modbus protocol, so is it possible to log the data.
Regards,
Gopalakrishnan.N
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Re: Help with pvbrowser
May 18, 2008 5:06 pm, by Michael Griffin
I've only looked at PVBrowser, so I can't answer all your questions about it. I would suggest contacting the author directly with questions (there is contact information on the PVBrowser web site). One of the authors occasionally responds on this list. Since he hasn't in this case, I can try to make a few suggestions.
Their web site lists about 8 different protocols that they support. It is a bit hard to make suggestions though when you haven't stated what "simple data format" your data is in. How do you intend to get the information from your machines to where the you would like to log it?
From what I can see of PVBrowser, their data acquisition system works by running separate communications daemons (background processes) for each fieldbus network interface. Each daemon communicates with the ProcessViewServer using shared memory. Each PVBrowser instance then communicates with the server using a special protocol (this is for displaying the data). You use the PVDevelop software to create your application. You can customise it in C++ or Python, so you can probably do just about anything. The big question then is how much is already built in, and how much you have to do yourself.
Their documentation is in 5 languages, but I agree that it seems to dive into the technical details too quickly. There is some mention on their web site of having had to temporarily close their forums because of continuous spam attacks. I think you will need to e-mail them directly for more information.
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