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| 9/19/2013 6:25 PM | |
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Posts: 47 Rating:
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Dear Experts I'm new (*** So I came back to investigate and finally see values from PLC at Matrikon OPC server (attached picture). But now I dont know what to do because I want to write values in PLC via OPC but as far I see it not possible (If yes, please let me know). At this point I look for a type of "Getting Started" for OPC server for Siemens Products or some information that guide me. Maybe you are wondering why I want to use OPC Server, well the main goal is try to make an application using Matlab + S7-300 for Fuzzy Control, and yes I already found that there is special addons for this type of applications but unfortunatly there are expensive. I found an other alternative but first I want to setup an OPC server Video Regards. |
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| 9/19/2013 10:04 PM | |
Joined: 9/27/2006 Last visit: 3/19/2025 Posts: 12344 Rating:
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Hello JAS; OPC works on a principle of server/client. A server provides information to the system, much as a menu when you go to a restaurant. The client selects the information that it needs from the server's menu, also much as in a restaurant. See the following definitions, taken from these manuals (which you should study a bit in order to get the OPC links working to your satisfaction): SIMATIC NET PC software Industrial Communication with PG/PC Volume 1 - Basics System Manual SIMATIC NET PC software Industrial Communication with PG/PC Volume 2 - Interfaces Programming Manual OPC Server OPC components that supply data are called OPC servers. They implement the interfacing to existing communication systems. Apart from services, they provide information from various data sources for the OPC client; these can be hardware-driven data sources or software components. The data is required, for example, from interfaces, fieldbus cards, measuring devices, or controllers. OPC client The OPC interface is based on the principle of co-operation between an initiating process (sends requests, issues jobs) and a responding process (processes requests and jobs) - client and server.OPC components that use an OPC server as data source are called OPC clients. So a server by itself cannot "send" or "write" information to a client over OPC. The client must select from the server(s) it is connected to the information it requires. Hope this helps, Daniel Chartier |
Last edited by: dchartier at: 9/19/2013 10:04 PM |
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| 9/19/2013 10:33 PM | |
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Posts: 47 Rating:
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The easiest way to explain how a server-client configuration works. Now lets see what kind of socery does this communication could do By the way, I found this link Followed step-by-step but I'm stuck at the point when you access to your S7_Connection (pag. 21 of pdf) because at OPC Scout didnt show it and I dont know what I did wrong. There is no problem of connection because using PST I see PLC (attach some pictures). Additional Information: -Have Simatic Net PC Software V8.2 SP1 AttachmentPictures.zip (121 Downloads) |
| 9/19/2013 10:37 PM | |
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Posts: 47 Rating:
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here is the project of STEP 7
AttachmentOpc_2.zip (131 Downloads) |
| 9/19/2013 10:57 PM | |
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Posts: 23 Rating:
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Hello, You can find application examples on this website by filtering. See attached schreenshot. Regards, Gerdoo |
| 9/19/2013 10:59 PM | |
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Posts: 47 Rating:
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let see |
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