Sewage disposal PLC process automatic control system

Abstract

The invention relates to a sewage disposal PLC process automatic control system which consists of a server, an online UPS, an RS232 / RS485 converter, a plurality of PLC control units and a plurality of measurement and control points of each PLC control unit. The online UPS is connected with the server which is connected with the RS232 / RS485 converter; the system also includes a 1 revolution XRS485 hub which can prolong the communication distance again, wherein, one end of the hub is connected with the RS232 / RS485 converter, and the other end thereof is connected with the PLC control units; meanwhile, the PLC control units are connected with and control the measurement and control points. When the system is only connected with one PLC control unit, the PLC control unit can be directly connected with the RS232 / RS485 converter. If a TCP / IP-RS485 protocol converter is adopted, a host machine can communicate through LAN with the PLC control units, thereby not being limited by the communication distance of RS485. The measurement and control points serve as sensors and executive parts on site of sewage disposal. The server is simultaneously connected with a printer which is taken as basic configuration of the system and can be used for hard copy of various files. The sewage disposal PLC process automatic control system can improve the operating efficiency of a sewage control machine set, reduce the operating cost and improve the water quality; long-range control in the true sense can be realized by overcoming communication distance limitation, therefore, the system has advanced technology and strong practicability, brings remarkable technical effects and economic benefit and has wide market prospect.

Description

technical field [0001] The invention belongs to a sewage treatment control system, in particular to a PLC process automatic control system for sewage treatment. Background technique [0002] In recent years, in order to achieve high quality, low consumption, stable and reliable operation, many sewage treatment plants at home and abroad have adopted modern advanced automatic control technology and computer technology to form a computer supervision, control, and management system to optimize the system. The programmable logic controller (PLC) is a new type of general-purpose automatic control device developed with a microprocessor as the core and integrated computer technology, automatic control technology and communication technology. [0003] The existing PLC for sewage treatment has the functions of data collection, control algorithm implementation, control command issuance and process signal chaining. It transmits control commands to the executive agency through various se...

AI Technical Summary

Problems solved by technology

The PLC automatic control system has the characteristics of superior performance, flexibility, versatility, and high reliability. However, its communication distance is limited, and it is often limited to the supervision, control, and management of sewage treatment in a small area, and has not realized remote control in the true sense.

Moreover, the existing control system can only satisfy the control of a limited number of processing points at the same time, and cannot implement centralized scheduling and management of multiple processing sites, so the efficiency is low

Images