Abstract
The design of water under the building requirements, design a set by the PLC, transducer pressure transmitter, multiple pump units, computers, communications equipment modules and other major form of automatic / manual one constant pressure water supply system with automatic frequency constant pressure operation, automatic frequency operation, on-site manual control functions.
Through the converter built-in preset parameters of PID modules, use the amount of pressure transducer pressure feedback, closed loop system, according to changes in water consumption, to PID regulation mode, the entire flow range of continuous adjustment using variable frequency pump and classification of the pump frequency of a combination of constant pressure water supply and effective energy conservation.
Discusses the design of parallel multi-pump water supply scheme is reasonable, of the multi-mode pump water water supplies status and conversion conditions, analysis of changing the motor from the inverter frequency during the switchover operation mode is given to achieve an effective state cycle conversion of electrical control design and PLC control program design. Through the communication protocol between the computer and the PLC has completed, the lower computer communications settings, given the computer monitor, through the communication module for remote monitoring of water supply systems.