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Control of Hydraulic Pulse System Based on the PLC and State Machine Programming

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Institute of Forensic Engineering, Brno University of Technology, Purkyňova, 464/118, Brno 61200, Czech Republic
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Institute of Forensic Engineering, Brno University of Technology, Purkyňova, 464/118, Brno 61200, Czech Republic
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Author to whom correspondence should be addressed.
This paper is an extended version of paper published in the International Conference Applied Electronics 2015, University of West Bohemia, Pilsen, Czech Republic, pp. 175–180, ISBN 978-80-261-0386-8.
Designs 2018, 2(4), 48; https://doi.org/10.3390/designs2040048
Received: 17 September 2018 / Revised: 28 October 2018 / Accepted: 14 November 2018 / Published: 20 November 2018
In this paper, we deal with a simple embedded electronic system for an industrial pneumatic–hydraulic system, based on a low-cost programmable logic controller (PLC) and industrial electronic parts with 24 V logic. The developed system is a hydraulic pulse system and generates a series of high-pressure hydraulic pulses with up to a max. 200 bar output pressure level and with up to a max. 2 Hz output hydraulic pulses frequency. In this paper we are describing requirements, the concept of the embedded control system in a diagram, security features and its industrial network connectivity (CAN bus, MODBUS). In description of the software solution we describe the implementation of the program threads approach in this low-cost PLC. The PLC programming with threads generate two layers of services—physical and application layer, and as a result, the threads create the main control state machine. In conclusion, we describe the calibration method of the system and the calibration curves. For further study we offer readers the full programming code written in sequential function charts to be used as PLC language. The cost of the described industrial networked control system with industry standard optoelectronic insulated interfaces and certified industrial safety relay does not exceed €1000 Euros. View Full-Text
Keywords: PLC programming; hydraulic pulse system; state machine programming PLC programming; hydraulic pulse system; state machine programming
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Pančík, J.; Maxera, P. Control of Hydraulic Pulse System Based on the PLC and State Machine Programming. Designs 2018, 2, 48.

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