PLC在太阳能热水器中的选型

long with the developing and using widely of PLC, function, the price and the suitable situation of the different type PLC are also various. Personnels who engage in the PLC design or the application technical in the solar energy using domain, if must design the performance price compared to the most superior control system, should grasp to the PLC type choice. The choice of PLC must consider the many kinds of factors, This article which unifies the actual example makes an elaboration on the PLC choice principle.