Control System Selection

How about radio transmission?

Please define "Vast".

The way that I would aproach this would be to incorporate a small PLC such as a Unitronics Jazz PLC and a GPRS Modem. The PLC would control all aspecs of the pump operation and comunicate directly with the GPRS Modem, then your Central Office can be in your pocket (cell phone). You can send each pump text messages to check, operation status, reset of faults, manual starting and stopping, etc. You can also interograte each pump station to find out its operational status, this could be a simple text message such as a "?", The pump station would then reply to your text with replies such as, idle, run 3150 LPH (litres per hour), total run time, etc.

The other way is to have the GPRS Modem log into a website and update the its operational status on a real time basis. You can also log on to the website and have the ability to modify all aspecs of operation and control.

Sure with both ways there is a bit of programming to do, less with the text messaging and a lot more with the website system, both systems have their pros and cons. It realy comes down to what you want the system to do for you.

Hope this has been of help.

Cheers

Joe

You can go for analog signal (4-20 mA) with wireless system and for digital signal you can put remote I/O's,

You can save lot of money in the form of wiring, junction boxes, cable trays etc.

Thanks

Pramendra Kumar

josej-

As stated in these posts, wireless is the way to go. The manufacturers that I use are shown below. I currently have multiple sites with PLC's communicating wirelessly back to a central station. Cellualar (AT&T, Verizon, etc.) currently charged per bit/byte of information. If you create your own wireless network, the cost will depend on the distance between the PLC and central station. Also, the costs will increase if you require a mesh network as opposed to line of site simple communication.

My site:

http://www.innovativelogicalcontrols.com

Here is what I use successfully:

PLC's

http://www.ezautomation.net

http://www.avg.net

Wireless

http://www.digi.com/products/wireless/xtend.jsp#models

Please post your successes or failures!