The Development Environment You can use OPC UA worksheets to communicate with OPC servers via the new OPC Unified Architecture protocol. OPC XML/DA You can use OPC XML/DA worksheets to communicate with OPC servers via the new OPC XML- DA protocol. TCP/IP You can use TCP/IP worksheets to configure communication between your own project and other IWS projects. The TCP/IP Client and TCP/IP Server modules enable two or more projects to keep their databases synchronized using the TCP/IP protocol. Page 44