10/30/2012 4:41 PM | |
Posts: 6 Rating: (0) |
Dear Daniel, I'm waiting your message. Kind Regards, Alkan
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10/31/2012 2:52 AM | |
Joined: 9/27/2006 Last visit: 5/12/2024 Posts: 12257 Rating: (2667) |
Hello akunuvar; It took a bit of searching through my files to locate some propositions we developped for our remote SCADA application, a few years ago. These are general topologies that can be built up using various vendors, and Siemens is at the top of the selection process, as WinCC offers multiproject and server-client applications that can easily be used to construct them. In both drawings weshow individual plants, each with its own process control PLC, so each plant is autonomous in case of loss of communications with the central control room. Eah local plant is alsomcommunicating with its own network of remote stations (ETS: energy transfer stations) over fiber optics (the green line). In Plant A we would install a central control room for distributed access to all plants. A dedicated fiber optic network (singlemode fiber) would connect all plants. The difference between the 2 versions of the proposal is the local and central control room servers. In the first version, a redundant pair of SCADSA servers is installed in each local control room, accessing the local PLC. A redundant pair of servers is also present in the central control room, reading the data from the local servers and sending commands to the local PLCs through the local servers. In the second version, the local control rooms are built around standalone SCADA stations, and the central control room contains multiclients, able to connect to all the standalone projects in each plant. I will not say which of the versions was accepted by the client and implemented, this I consider to be proprietary information .But both versions were tested (in simulation) and proven possible. I can tell you that cost (computers, licenses and project development) was what made the difference between the 2 implementaions in the client's eyes. For your part of the project that would use the Internet, I believe it good practices to request static IP addresses from the Internet provider for each local plant as part of the network setup. You can then use something like WinCC WebNavigator to establish a client/server link between the central control room and the local control rooms. I would hope someone with more direct experience with this kind of setup than I have please invite themselves to this discussion. Hope this helps, Daniel Chartier AttachmentRemote SCADA.pdf (89 Downloads) |
1/6/2014 3:01 PM | |
Joined: 9/1/2005 Last visit: 5/10/2024 Posts: 4100 Rating: (193) |
follow up question published by Farzad is split to a seperate thread with the subject Read data and send command from Central server to Local standalone server . Best regard |
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