IIoT Device Prototype Design Using State Machine According to OPC UA

Abstract

This article proposes a digital twin design using a finite state machine (FSM) that can be integrated and used for the simulation requirements of a production process. The FSM used to introduce the proposed concept can create a fully fledged digital twin. The design of the state machine ensures the functionality of the control systems, parts of the production line, and the associated Internet of Things (IoT) devices. The concept can be extended using an interface that can communicate at the level of the required protocol, thereby ensuring the possibility of integration into the production line. The digital twin can be used as a model and basic platform to develop an IoT hardware device. The advantage of this system is that its implementation can be verified with or without a physical prototype. It is possible to test hybrid implementation, where hardware elements are partially integrated into the software model created based on FSM. The design of the IoT device was verified on a production line, where it was adaptively controlled the delivery rate of material for sorting. It introduces an opportunity to test or simulate a possible planned change in production infrastructure, in which it is possible to better understand the solution and verify the expected changes and their effect on production. The design can be fully used in accordance with Industry 4.0.