Abstract
The paper proposes the author’s version of preliminary diagnostics of the state of rolling surfaces of large-sized technological units. The authors build their research based on the requirements of regulatory documents governing the conduct of equipment vibration diagnostics, and processing the results of the measurements obtained.
 The authors propose their own justified option for placing vibration sensors on the equip-ment elements, including the use of wireless sensors placed on the rotating equipment elements. At the same time, the choice of the proposed data transfer protocol provides real-time monitoring of the technological unit state, with significant dimensions of the equipment itself. In accordance with the standard requirements, these solutions ensure the reliable operation of technological units and equipment.
 The developed algorithm allows one to per-form a comparative evaluation in the diagnosed units and equipment elements and determine not only the defective element, but its type and approximate location on the element surface, which is necessary during the prerepair preparation.
 The results presented in the paper can be useful not only for researchers performing similar work, but also for production engineers involved in automating control and diagnostic processes, as well as performing equipment maintenance and repair
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