1 Introduction

Driven by the market competition incentives and the advancement of industrial automation technology, how to integrate and optimize the three elements of people/organizations, management and technology and their information flow, logistics and capital flow in the various stages of the production process, It is a complicated system engineering to enable enterprises to win market competition. The modern integrated manufacturing system CIMS (Contemporary Integrated Manufacturing System) is a comprehensive high-tech that is developed in response to this trend. It is an advanced concept of organizing, managing and operating enterprises. Based on the characteristics of the process industry, this paper makes a rough discussion on the process industry CIMS system technology from the local practical experience.

2 CIMS Engineering Principles

2.1 The Connotation of CIMS The concept of Computer Integrated Manufacturing (CIM) was first proposed by Dr. Joseph Harrington of the United States in 1973. The basic idea is:

(1) All aspects of production, including market analysis, product design, processing and manufacturing, operation management and after-sales service, are an inseparable whole. They must be closely connected and considered in a unified manner;

(2) The entire business process is essentially a process of data collection, transmission and processing, and the resulting product can be regarded as the material performance of the data. This is essentially a “system perspective” and an “information perspective.” This advanced concept was gradually taken into account by the manufacturing sector in the early 1980s and put into practice. In 1992, a working group of the International Organization for Standardization (ISO) defined CIM as “combining human and business knowledge capabilities with information technology and manufacturing technologies to increase the productivity and responsiveness of manufacturing companies, thereby People, functions, information, and organization are integrated into one." Then the concept of Computer Integrated Manufacturing System (CIMS) emerged. CIMS is a computerized, informationized, intelligent, integrated and optimized manufacturing system based on the concept of computer integrated manufacturing. CIMS is produced along with the development of CAD/CAM. Through the system integration, the isolated automation subsystems dispersed in the product design and manufacturing process are organically linked to form an integration suitable for multi-variety and small batch production to achieve overall benefits. And intelligent manufacturing systems. Integration reflects the breadth of automation, extending the scope of the system to the entire process of market forecasting, product design, manufacturing, inspection, sales and after-sales services. Intelligentization reflects the depth of automation. It not only involves the traditional manual labor automation of material flow control, but also the automation of mental work controlled by information flow control.

The CIMS subject expert group of China's 863 Program puts forward the concept of new computer integrated manufacturing based on the national conditions: "Computer integrated manufacturing is a concept of organization, management and operation of enterprises. It will be traditional manufacturing technology and modern information technology, management technology. , automation technology, system engineering technology and other organic integration, with the help of computers to make the entire life cycle of enterprise products - market demand analysis, product definition, research and development, design, manufacturing, support (including quality, sales, procurement, delivery, service) and products Finally, the three elements of people/organization, management and technology and their information flow, logistics and value flow in the various stages of retirement, environmental treatment and other activities are integrated and optimized to realize computerization, informationization and intelligence of enterprise manufacturing activities. Optimization and integration, in order to achieve rapid product launch, high quality, low consumption, good service, clean environment, and thus improve the flexibility, robustness and agility of the enterprise, so that enterprises win market competition. Correspondingly, China's CIMS has changed to "Contemporary Integrated Manufacturing" and "Contemporary Integrated Manufacturing System", which has expanded the connotation of the original CIM/CIMS in breadth and depth. Among them, the meaning of "modern" is computerization, informationization, and intelligence. "Integration" has a wider range of content, including three stages of integration of information integration, process integration and inter-enterprise integration; integration of three elements and three streams in enterprise activities; integration of CIMS-related technologies and various personnel Integration optimization, etc.

The above definition CIMS clearly points out the interrelationship between the three basic elements of people/organization, management and technology, as shown in Figure 1.

Figure 1 Integration of CIMS three elements

These three elements interact and restrict each other, so that manufacturing enterprises achieve global optimization. The three elements constitute a type 4 integration problem. Among them, the integration of business management and technology supports the company to achieve the expected business objectives. The integration of people/organizations and technologies allows them to work together, coordinate and maximize efficiency. The integration of people/organization and management is to support the operation and management of enterprises through the improvement of personnel quality and the improvement of organizational structure. Finally, the integration of people/organization, management and technology is realized, which enables the company to achieve overall optimization. The key to CIMS is to integrate and implement CIMS enterprises. When applying computers, the focus is on the overall optimization of enterprises, that is, to integrate the existing technologies of computer technology, automation technology, information technology and management science into one internal Link the overall operation to meet the needs of the company's business strategy. Under the guidance of the CIMS concept, analyzing the problems of enterprises and formulating global plans is the key to implementing CIMS and the foundation of CIMS technology. Therefore, implementing CIMS is an extremely complicated system engineering problem.

2.2 Differences between process industry and discrete industry CIMS Generally speaking, different manufacturing products produce different products, and their production methods, production processes and business methods are also different. The process industry mainly includes chemical, oil refining, papermaking, metallurgy and other industries. Most of these industries are mass-produced, the production process is continuous, the production process is basically unchanged, and the flow of materials and energy is continuous. Due to the unique real-time nature of this continuous production process in the process industry, the necessity of information acquisition is determined. It is the characteristics of the process industry that determine the difference between it and the composition of discrete industrial CIMS. 4 aspects:

(1) Production management, the production plan of the process industry can start from any part of the production process with obvious process characteristics. The discrete industry can only start from the starting point of the production process; the physical structure of the process industrial products is relatively simple, and the process is relatively fixed. The complexity of management is relatively low.

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