Research and Design of Soft PLC based on ARM and SIPROM

摘要

PLC is a dedicated control computer and is extensively applied in the fields such as machine manufacturingand industry control, but openness of its hardware structure and the programming system are not uniform due to differentmanufacturers. To solve incompatibility issue, the soft PLC concept is proposed in the late 90 s of 20th century. A PID isa closed-loop control system and features simple structure, stronger stability and higher reliability, so it is extensivelyapplied in the industry control field. This paper describes the software and hardware structure of the soft PLC systembased on ARM7, analyzes and studies PID control algorithm, and studies the PID parameter setting. The above researchsimulation completes parameter setting of the PID system, accumulates setting experiences, and improves the PID controlfunction performance of the soft PLC.