The article discusses the possibilities of using the OPC UA protocol to collect information from CNC machines and graphically represent data about the technological process, according to Industry 4.0 concept. A generalized organization structure of NC kernel with an embedded SoftPLC module, OPC UA server and various types of OPC UA clients has been developed. The mechanism of interaction between the NC kernel and the standalone OPC UA server is proposed. The possibility of developing a remote OPC UA web client based on the Node-red programming tool has been investigated.

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Nowadays, there is a big demand on using small sized CNC machine tools, which have low price tag, wide range of implementations, low manufacturing costs and can be used for educational purposes. These machines can achieve casual manufacturing routines, like milling and drilling in applications, where there is no need for high speed performances and super quality of products. In this work, we proposed a model of CNC for these machines and analysed its components and efficiency. The model consists of three main layers: CNC system (application layer), ARM based microcomputer as CAN master and controller (connecting layer) and Servo-Drive Step Motors (actuating layer).

In the post-industrial society, the means of collecting, processing and transmitting information have changed. These changes were reflected in industrial technologies, in which there was a transition from a concept aimed at automating individual machines and processes to a concept that provides a digital representation of all physical assets, followed by integration into a digital global system, built together with partners involved in the value chain. The new concept is based on a multilevel, complex, global technological and organizational system, which implies the integration of physical operations and their accompanying processes into a single information space. The effect of its implementation is possible if the process of receiving, analyzing and exchanging data between technological equipment and various levels of the production system as a whole is structured.