How many page_view on a workspace

[khuenguyen]

Hi all,

I am using DAQFactory Rel 5.84. Can I create how many page_view on a workspace? My project is monitor 70.000 BTS. Each BTS need monitor Fire, Air, intrusion, 2 motors, etc... about 15 sensors.

Thanks.

[AzeoTech]

There is no limit. However, if your pages are all identical or close to identical except for what system they are viewing, you are much better off creating one page and simply changing what that page displays. That way you can make an edit on one page and it carries across all 70 BTS systems. Do this by naming all your channels the same across all 70 BTS systems, but numbered, so, say, Air1, Air2, Air3, etc. Then create a global variable to hold the currently displayed BTS system number, and use evaluate() to build the channel name:

evaluate("Air" + curSystemNumber + "[0]")

[khuenguyen]

seventy thousand BTS, not 70 BTS

[AzeoTech]

From a single DAQFactory? You'll definitely want to use the technique I described.

[khuenguyen]

At this time, we are preparing for the project, so we want evaluate the ability of DF.

[AzeoTech]

I don't think you want to try and do a million tags in a single copy of DAQFactory. I'm not sure you want to do that many tags in a single PC period. One PC can only poll so fast. A better choice is probably to use multiple DAQFactory's or other solutions to ping subsets, and then push the data to a solution like DAQConnect (www.daqconnect.com). With 70000 locations, you'd probably want the dedicated server option they offer.

[khuenguyen]

I understand, I cann't use single DAQFactory for this project. I want evaluate, how many DFs are enough for this project?

[AzeoTech]

Its hard to say. You can certainly do 100 or so locations with a single PC, but it really depends on the processor power of the PC and the throughput of the network. Remember also that you can use Runtime licenses for all these installations and save the development license for your office.

[khuenguyen]

Hi Admin,

In first response, you guide me use " evaluate("Air" + curSystemNumber + "[0]") " but I still don't understand how to use it. Can you explain more?

thanks you.

[AzeoTech]

On your page, in any expression that needs to change based on the systemNumber, you should put, for example:

evaluate("Air" + curSystemNumber + "[0]")

instead of:

Air0[0]

Then you can simply change curSystemNumber to whichever system you want and it will display Air0[0], Air1[0], etc. thus updating your entire screen by changing only one variable.