Control System Based on PLC and Touch Screen for Energy-Saving in Public Lighting
PLC dynamically adjusts power voltage by controlling switches of transformers with different combinations, which is based on the theory of 8421, and makes voltage changes in a very small range. By using this system, energy is saved, and the damage of illumination equipment from voltage instability is greatly reduced, and the life of lamps is effectively extended. Meanwhile, by using the touch screen, this system not only can realize the real time parameter display, but also achieve the real time operation on the panel.
H. Wang, B.J. Zhang, X.Z. Liu, D.Z. Luo, S.B. Zhong
S. X. Zhu et al., "Control System Based on PLC and Touch Screen for Energy-Saving in Public Lighting", Advanced Materials Research, Vols. 143-144, pp. 576-579, 2011