The Specifics of Building a Cross-Platform OPC UA Server for a CNC System

There is a justified need for a cross-platform implementation of an OPC UA server for a CNC system. The available open-source libraries that implement the OPC UA stack have been analyzed, and a solution based on open62541 has been selected. An architectural model for the interaction between the OPC UA server and the CNC system core has been proposed. In addition to the traditional mechanism for obtaining current data values from the CNC system core, the OPC UA server implements a mechanism for working with historical data and a mechanism for controlling the CNC system by sending commands through a control channel via a callback method. Class diagrams illustrating the implementation of these mechanisms have been provided. An OPC UA client has been developed in C# programming language for testing the cross-platform OPC UA server of the CNC system.