For the water treatment automation system of the water purification plant, we generally divide it into three layers: information layer, control layer and equipment layer for design. As the information layer, the central control room includes engineer station, operator station, video station, data server and printer. Use optical cables and core switches as the transmission methods and channels for information exchange. The control layer is generally divided into two designs according to the actual water treatment scale: medium-scale water treatment control system and large-scale water treatment control system.

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Water treatment control system of medium-scale water purification plant

 

For medium-scale water treatment tasks, NA300 series PLC can be used for related control, and then the information of each control station can be monitored through the NATouch touch screen.

 

 

 

 

 

 

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Water treatment control system of large-scale water purification plant

 

For large-scale water treatment tasks, NA400 series PLC can be used for related control, and then the information of each control station can be monitored through the NATouch touch screen. The NA400 large PLC has multiple redundant functions such as CPU hot standby redundancy, power supply redundancy, and network redundancy. At the same time, the PLC system can be connected to the ring network to ensure the safety and reliability of the system.