Hua-Li Hu

Design and implementation of dual machine redundant liquid level control system based on S7-1200 programmable logic controller

To address the conflict between the high reliability demands of small-to-medium-scale automation systems and the prohibitive cost of dedicated redundant Programmable Logic Controllers (PLCs), this paper proposes a dual-PLC redundant liquid level control scheme based on two Siemens S7-1200 controllers. The system adopts...