Designing Hardware Systems for Embedded Soft PLCs in Engineering Machinery Controllers

The construction machinery industry faces the challenge of outdated programmable controllers (PLCs) with limited versatility. To meet the evolving needs of this industry, adherence to the IEC61131-3 standard has become essential. This standard revolutionizes controller technology, providing five unified programming languages and enabling cross-compatibility among controllers. This paper explores the significance of open embedded soft PLCs that adhere to this standard, aiming to enhance controller versatility, meet market demands, and increase the international market share of construction machinery. The research delves into the hardware system design of a universal controller for construction machinery, addressing power protection, voltage conversion, clock circuit, JTAG interface, input modules, pulse volume acquisition, output modules, and communication interfaces. Through detailed design processes and schematic representations, this research contributes to the advancement of construction machinery controller technology.