This article discusses the theoretical and practical aspects of controlling a frequency converter through a programmable logic controller, and also analyzes the main methods and technologies used in analyzing the operating time of a controlled asynchronous motor. The possibility of organizing remote and multiple control of several frequency converters from one PLC (programmable logic controller) in large production areas is considered. If complex control with the exchange of large amounts of data, diagnostics and monitoring of drive operation in real time has been analyzed, it is preferable to use the RS-485 interface, which allows integration with more complex automation systems that require software control of various parameters.

Keywords: industrial controllers, frequency converter, analog control

This article discusses the theoretical and practical aspects of remotely connecting a user to an automation system controller, as well as analyzes the main methods and technologies used in this process.

Keywords: industrial controllers, remote connection to the controller, Modbus TCP

The simplest, most reliable and sufficiently accurate method of dosing bulk products is batch dosing by volume using measuring containers. The article considers a mathematical model of a volumetric dispenser. The combination of several methods of regulating the supply of bulk materials during batch dosing is ensured by building an accurate model of the drum dispenser.

Keywords: mathematical model of a drum dispenser, dosing process, friction, dynamic coefficient of friction, static coefficient of friction, bulk material

In this article, the object of study is the drying of plant products in a combined drying apparatus using infrared radiation, convection and reduced pressure. The process of drying products in the food industry is still relevant today in connection with the optimization of efficiency and reduction of energy consumption. In the presented experimental study, the following products are used: apples, bell peppers, bananas. The slice thickness varies from 5 to 10 mm. Observations show that, with optimal parameters and drying modes, the possibility of using the described drying installation is fully expedient.

Keywords: drying, infrared radiation, reduced pressure, convection, dried food, pilot plant

The article presents a description of the device for determining the physicomechanical characteristics of bulk materials - coefficients of external and internal friction. In DSTU, a device for determining the friction characteristics of bulk materials was designed and manufactured. A method for determining the coefficients of static and dynamic friction is presented. The proposed device allows to obtain more accurate information about the frictional characteristics of one or different bulk materials in static and dynamic conditions.

Keywords: Friction, dynamic coefficient of friction, static coefficient of friction, bulk material