[?] Best webbased scada system?

[genesisfm]

Hi,

I'm looking for a webbased scada system.
My question is, what is the best (simple / most addons / most features / greatist lib. / etc.).

I want to use it with siemens S7.

Thnx

Grtz R

[deymon]

http://support.progea.com/webclient/

[zxcslo]

http://support.progea.com/webclient/

Very, very, very slow....

[indian]

Code: Select all

The most straightforward way of publishing Web data is using standard HTML (hypertext markup language). This is the original language of the World Wide Web. While it works great for viewing static pages of data, it fails miserably when trying to view changing data or provide real-time control of a machine. The reason is that HTML is designed to be client-driven.

(1. Java technique)
With HTML, the client browser is responsible for requesting new data, and there is no mechanism for the server to “push” new data to the client. To get real-time updates, the client must “poll” the server by requesting refreshes on a regular basis. Since this means resending an entire page of data, update frequency rates are severely limited. 

(2 Screen scraping technique)
Another common option for remote monitoring and control is a class of technologies known as “screen scraping.” This is the approach taken by most remote HMI products. As the name implies, these technologies essentially scrape off the image on the server’s screen and transfer it to the client. The client machine then displays the server’s screen image, and transfers its own user input to the server. … Because so much data are being transferred, screen scraping requires high-speed connections, and it severely limits the number of clients. 

(3 ActiveX technique)
Another common approach is to create a custom browser plug-in that is responsible for communicating with the server and transferring information to a remote thin client. If the program is designed well, this approach can solve the bandwidth problem by eliminating the need to poll for data and transferring only information that has changed. This approach also can allow remote operators to view different screens than what the server shows.


CONTROL ENGINEERING, jan 2009

may be this survey is not global, so my question to ALL:

Do you know which technique is used in yours HMI/SCADA?

Just the names of HMI/SCADA and technique, it is enough.

[Schtiel]

MBLogic - Open Source Web-based HMI

Manufacturing automation software for communicating with and controlling factory and process equipment. It includes multi-protocol communications servers (including Modbus/TCP), clients, PLC soft logic, MMI, and other associated systems.

http://sourceforge.net/projects/mblogic/
http://mblogic.sourceforge.net/

[mohamad]

http://www.indusoft.com/