Distributed control system and control method of glass magnesium board production line

Abstract

The invention discloses a distributed control system of a glass magnesium board production line and a control method thereof. The distributed control system of a glass magnesium board production line includes an upper computer IPC, a template on-line control unit, a board conveying control unit, a batching stirring control unit, and a board forming control unit. unit, plate cutting control unit, and plate entering cage control unit. The upper computer IPC serves as the master station of Modbus, and each control unit serves as the slave station of Modbus, which together constitute the distributed control system of the glass magnesium board production line. The upper computer IPC is responsible for the data exchange between each control unit to ensure the coordinated work of each control unit; each control unit includes a PLC and a touch screen, under the coordination of the upper computer IPC, realize the control of their respective units. The invention adopts distributed control, integrates technologies such as industrial bus technology, advanced sensor technology, PID technology and remote monitoring into the control system, and has a high degree of automation.

Description

technical field [0001] The invention belongs to the field of control, in particular to a distributed control system and a control method for a glass magnesium board production line. Background technique [0002] For a long time, the distributed control system of the glass magnesium board production line has adopted the method of relay control or PLC control. At present, the distributed control system of the glass magnesium board production line mainly has the following problems: ①The distributed control system of the glass magnesium board production line adopts relay control or PLC control, and the relay control mode is used. The system has poor flexibility and low reliability. PLC control is adopted. Although the method avoids some defects of the relay control method, the whole production line of the glass magnesium board production line is very long, and the signals collected at each point are scattered. These signals are directly connected to the PLC through wires. The r...

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Problems solved by technology

At present, the distributed control system of the glass magnesium board production line mainly has the following problems: ①The distributed control system of the glass magnesium board production line adopts relay control or PLC control, and the relay control mode is used. The system has poor flexibility and low reliability. PLC control is adopted. Although the method avoids some defects of the relay control method, the whole production line of the glass magnesium board production line is very long, and the signals collected at each point are scattered. These signals are directly connected to the PLC through wires. The reliability of the system is improved; ②The glass magnesium board automatic cutting unit can only cut and process glass magnesium boards of one length and size, resulting in a production line that can only produce glass magnesium boards of one length and size, reducing the utilization of the production line ③ In order to produce glass magnesium boards of different thicknesses in the glass magnesium board production line, it is necessary to adjust the distance between the upper extrusion roll and the lower extrusion roll of the plate extrusion forming device, and the distance between the upper and lower calender rolls. Manual adjustment of the spacing by visual inspection is labor-intensive and has large errors; ④ When processing a batch of glass magnesium boards, the spacing between the upper extrusion roll and the lower extrusion roll of the sheet extrusion molding device, and the spacing between the upper and lower rolls of the calendering They are all fixed, but the thickness of the actual template is different, resulting in inconsistent thickness of the extruded glass magnesium board; The size of the opening remains the same. At the beginning, there are more mixed raw materials stored in the storage tank, and the speed of the mixed raw materials flowing to the formwork is fast. The mixed raw materials stored in the storage tank are less and less, and the speed of the mixed raw materials flowing to the formwork is gradually slowed down. , leading to the different density of the same batch of glass magnesium boards, which affects the quality of glass magnesium boards; ⑥The distributed control system of glass magnesium board production line adopts relay control or PLC control, which does not have the function of remote monitoring, which is not conducive to the production line of glass magnesium boards. management

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