Opcnetapidll

Demystifying OpcNetApi.dll : The Gateway to Classic OPC for .NET Developers

Instead of constantly polling for data, OPCNetAPI.dll supports subscriptions. A SubscriptionState object can be created to subscribe to specific tags. When a value changes in the PLC, the OPC Server triggers a DataChanged event in the .NET application. 4. Writing Data opcnetapidll

: It is almost always used alongside OpcNetApi.Com.dll , which handles the actual conversion between .NET calls and COM-based OPC servers. Technical Requirements Demystifying OpcNetApi

: In Visual Studio, go to your Project Properties -> Build tab. Change the Platform target from "Any CPU" to x86 . 2. Standard DCOM Access Denied (0x80070005) opcnetapidll