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5/29/2008 8:48 PM | |
Joined: 12/22/2006 Last visit: 1/25/2022 Posts: 1742 Rating: (309) |
What I mostly do is using OPC Scout (which is a free OPC Client delivered together with SImatic Net). There you can try to read a datablock. And you can see the syntax used by OPC Scout. And reuse it in your application. There is also a manual with OPC interface descriptions. http://support.automation.siemens.com/WW/view/en/24843817 An example from this document: Instance data block parameter S7:[S7-connection-1]DI5,W10,9 DI5,W10,9 identifies 9 data words starting at byte address 10 in instance data block 5. |
Best regards |
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