Four-Point Leveling System Controlled by PLC
Ren Zuo-xin · Journal of North China Institute of Technology · 2004
A four-point automatic levelling system is designed with PLC as master-control device by using rise-levelling technology in this paper. The system has the advantages of simple principle, stable and reliable control property. The speed of leveling is very fast and it is proved to be able to satisfy the expected control goal, so it can be widely applied to different kinds of leveling system.