The low cost embedded control of the industrial hydraulic pulse system based on PLC and state machine design

In the paper we describe the control electronics for an industrial test system based on a low cost PLC. The developed system is a hydraulic pulse system and it generates series of high pressure hydraulic pulses (max. 200bar) and is based on pneumatic-hydraulic circuits. We describe requirements, an overall concept of the embedded control system, user interface, security features and network connectivity. In the description of the software solution we describe implementation of hierarchical ordered program threads (multithreaded program) and main control state machine. At the conclusion, we describe the calibration method of the system and calibration curves, we present the schematic diagram and a photo of a functional prototype of the system.