OPC XML Demo Servers

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OPC XML Sample Server

The OPC XML Sample Server is not installed with the product(s), but is made available on the Internet. You can use it for your explorations and tests. The server's URL is

Our example code also refers to this server, so that the examples can be run without having to set up a server locally.

The server is based on the sample server code from OPC Foundation. It provides some OPC data of its own, and it wraps two OPC COM-based servers (OPC-DA 2.0 and OPC-DA 3.0). It contains a combination of items of various data types, static and dynamic, some readable and some also writeable.

OPC XML does not define a way for server discovery (browsing for servers). For this reason, if you are using user interface components such as the browsing dialogs or controls, you need to specify the server manually, using its URL.

The following picture illustrates the address space of the sample server:


Online Service Restrictions


Note: You are only licensed to use this online service/services with connections made from QuickOPC, and not from any other software. Also, please do not use it for any kind of load or volume testing or tests that require substantial computing or network resources (such as subscribing to many variables at once), because that could have negative impact on other users, and on our ability to provide this online service. We reserve the right to deny access to online services when we detect that these conditions has not been followed.