The Development Environment Comm tab The Comm tab of the Project Explorer organizes the worksheets that control communication with remote devices, using either direct communication drivers or other common protocols. Comm tab of the Project Explorer The folders on the Comm tab are described in the following sections: Drivers You can use Driver worksheets to communicate with PLCs and other hardware, using any of the hundreds of direct communication drivers that are installed with the development application. OPC DA 2.05 You can use OPC worksheets to communicate with OPC servers via the OPC Classic protocol.
OPC UA You can use OPC UA worksheets to communicate with OPC servers via the new OPC Unified Architecture protocol. OPC .Net You can use OPC .Net worksheets to communicate with OPC servers via the new OPC .NET 3.0 protocol (formerly OPC Xi). Page 46