The control scale and complexity of the process control system

1. According to the control scale and complexity of the process control system

For different metallurgical production processes, the control scale and complexity of the process control system are different. Usually, DCS is preferred when the process control system is large in scale and high in complexity. Because the system is developed according to the characteristics of the process control system, it can better process, analyze, and calculate a large amount of analog data information, and can complete various complex and cumbersome adjustment and control calculations, so it can complete large-scale work with large and complex process control systems. In 1995, in the CDQ project design of Jinan Iron and Steel Co., Ltd., (Allen Bradley 1756-PB75R Redundant Power Supply,  B&R Br X20bc0083 Bus Controller Ethernet Powerlink,Siemens 6ES7331-7RD00-0AB0 Analog Input Module,Siemens 6ES7350-1AH03-0AE0 SIMATIC S7-300 Counter Module)according to this principle, the process control system adopted Japan Yokogawa μXL DCS and achieved good results. 

2. Reasonable selection according to investment scale and project economic efficiency

In some small and medium-sized metallurgical projects, especially small and medium-sized transformation projects, the investment is small, and the PLC system with relatively low price and good cost performance should be preferred for small-scale instrument and control systems. For example, in 1991, in the design of projects such as the transformation project of the secondary cooling water distribution project of the No. 3 slab continuous casting machine of Jinan Iron and Steel Co., Ltd. and the transformation project of the heating furnace of the medium plate factory, Texas Instruments (USA) was selected in the process control system according to this principle. The TI-545 series PLC system produced by TI) has also achieved good results. 

Merry Christmas to those who enjoy it, WE WISH YOU HAPPY

and we will offer discount during Merry Xmas holiday.

Vivi (sh_plc@163.com).