The aim of the paper is to present the creation process of a digital twin based on
discrete-event simulation for a production logistics model system. The given system
is located in the Logistics 4.0 Laboratory of the Institute of Logistics of the University
of Miskolc. It consists of an automated, PLC-controlled material handling system based
on roller conveyors and turntables, which is supplemented by a gravity flow rack.
It also has multiple locations along the conveyor track that could serve as storage
or assembly stations. A real-scale model of the entire system was created with the
aid of Siemens Tecnomatix Plant Simulation. In the developed model, proprietary methods
control the transfer of raw materials, congestion management and the operation of
the turntables. Based on the operation of the complete system, the simulation examines
machine utilization, human resources and bottlenecks in the material flow. The results
demonstrate the advantages of using discrete-event simulation based digital twins
for the optimization of production logistics systems.
