Automatic control system

Various production lines of building gypsum plaster and plaster products can be equipped with electric control system of relevant level according to requirements of the client so as to meet the requirement of production.

Normally, medium and small scale production lines, such as plasterboard production lines with annual capacity of less than 10 million m², are equipped with relevant independent PLC control station according to respective independent production system in the process flow. There is no communication between PLC. Every PLC control station has respective independent function. Input and output modules of each PLC are directly connected with sensor, frequency converter, electric valve, relay and others. Each control system consists of two modes: local control and central control. The running conditions of equipment are shown on the man-machine interface and are clearly shown on the large simulation screen.

Large lines, such as plasterboard production lines with annual capacity of 20~50 million m², are provided with PLC communication network and computer central monitoring system making the production lines to have advanced automatic control level. Automatic control system of production line consists of one central control station and several PLC branch stations.

Host computer control station is a optional equipment and is used to monitor the running state of whole production line. Each branch station can be connected to host computer with industrial Ethernet. The command and data can be inter-transmitted between host computer and branch station PLC. The central monitoring computer has the following main functions:

(I)Collect various data from the control station for processing and statistics. The computer adopts multiple intuitive displaying of  common statistical data and running curve of main parameters. It has the function of data storage and printing;

(II)Intuitively show dynamic process flow of whole production line and dynamic process image of each control station.

(III)According to different production requirement of the production line, it can set relevant condition such as alarm condition etc.

(IV) In case of abnormal data, it has alarm function to warn the shift operator.

Production line is provided with TV monitoring system to monitor production process. It can intuitively control production dynamic so as to make reaction timely in case of accident, and make video recording of the important monitory points.

                                                  Scheme of computer monitor

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