HG/T 20573-2012Code for engineering design of distributed control systems (English PDF)

3.1 Terms and Definitions

For the purpose of this code, the following terms and definitions apply.

3.1.1 Application software

The generic term of computer programs, processes, regulations and relevant documents required to let DCS complete the supervision on a certain production process.

3.1.5 Broadband LAN

A kind of local area network that is able to encode and reuse the data and also is able to realize data transmission by wave carrier modulation.

3.1.6 Bus network

A kind of local area network that has only one access between any two data stations and in which the data sent by one station is usable for all other stations in the same transmission medium.

3.1.7 Communication system

A kind of system that is composed of various communication links, protocols and functional units and provides the effective communication among the component parts of computer network. This system ensures the information transfer by a decided mode in a group of interconnected stations.

3.1.11 Data station

A complete set of functional units that is also known as station and is composed of data terminal equipment, data circuit-terminating equipment and its common interface.

3.1.12 Distributed control system-DCS

A kind of intelligent station network that is characterized by distributed control function, centralized operating display and hierarchical structure. It is applied for the purpose of controlling or controlling and managing an industrial process or factory.

3.1.13 Engineer's operating station

The intelligent station provided for the Engineer at the supervision level of distributed control system to realize the system generation, which generally also has the functions of operator's station.

3.2 Abbreviations

This code adopts the following abbreviations.

4.1 Basic Technical Requirements

4.1.1 Dispersibility

DCS shall adopt distributed configuration over hardware units to realize the distribution of system functions and operation risks as well as the requirements of formidable function and flexible configuration.

4.1.4 Advancement

DCS shall have advanced hardware and software environment and be able to satisfy the requirements of runners on advanced control and real-time process optimization software.

4.1.5 Expansibility

It's required to construct the business information system or integrated management automatic system on the basis of DCS by utilizing the openness, extensibility and integrability of DCS.

4.2 Application Requirements

4.2.1 Independent application of DCS

The supervision function of DCS upon the production process shall meet the following requirements.

4.2.3 Combination between DCS and upper computer

The combination of DCS and upper computer shall meet the following requirements.

4.2.4 Combination between DCS and other control devices

DCS shall be able to adopt the communication mode to combine with the following supervision devices/ systems.

4.2.6 Application of computer integrated management system.

Computer integrated management system (CIMS) is constructed by integrating the DCS process control technology and the computer information management technology and is used for conducting the enterprise strategies for improving production, optimizing management and improving economic performance, etc.

5.1 Design Principles

5.1.1 DCS engineering design shall take comprehensive consideration of practicability, reliability, availability, maintainability, traceability, economical efficiency and expansibility, and shall reasonably adopt the redundant and tolerant technique.

5.1.5 The requirements on the combination of other complete sets of control systems shall be proposed according to the DCS configuration conditions of the main device; DCS also shall satisfy the special combination requirements proposed by the complete set of control systems as required.

5.2 Responsibility Distribution

The main works within the life cycle of DCS involved in this code, e.g. DCS engineering design, DCS purchasing, DCS installation and commissioning, as well as the DCS manufacture and after-sale service, are undertook by the designer, buyer and seller respectively, and the responsibility distribution is as follows.

5.2.1 DCS engineering designer is responsible for formulating the DCS supervision scheme, preparing the DCS technical specification and completing the DCS engineering design documents. It may cooperate with the DCS purchasing work according to the provisions of engineering design contract and also participate in the application software configuration, inspection, installation and test run of DCS.

6.1 Function of Control Stations

6.1.1 The control stations shall be provided with the function of realizing the input and processing of various physical signals and realizing the various real-time conventional continuous control, and also shall be constructed with the corresponding (or similar) function modules, like.

6.1.2 The control stations shall be provided with such control functions as realizing batch control, sequence/interlocking logic and the like, and also shall be constructed with the corresponding function modules, like the function modules of sequence control function category, switch instrument category and sequential control element category, etc.

6.2 Structure of Control Stations

6.2.1 Generally, the control station may be composed of process interface unit, control unit (controller) and data acquisition unit (being configured by the DCS manufacturer according to needs).

6.3 Technical Requirements of Control Stations

6.3.1 Process I/O interface unit

6.3.5 The standby of process interface should meet the following requirements.

6.3.6 The maximum load of control unit shall be less than 60%.

7.1 Function of Operator's Stations

7.1.1 Operator's station is the interface between system and operating personnel, it is used for the monitoring and operating of the operating personnel to production process and also used for configuration and maintenance. The operator's station shall also be provided with the historical/statistical data collection function and the trend/statement display and print function.

7.1.4 The trend display function of operator's station shall include real-time trend display and historical trend display. The sampling time of real-time trend curve should be 1s, and the curve time shall be Xmin at most. The sampling time of historical trend curve may be set as 1min to one month.

7.3 Technical Requirements of Operator's Stations

7.3.1 The hardware specification of operator's station shall be 32-bit bus and 32-bit or 64-bit CPU.

7.3.7 The data processing capacity of operator's station shall meet the following requirements. […]

8.1 Function of Engineer's Operating Stations

8.1.1 The engineer's operating station shall be able to complete the configuration of DCS and supervise the circuit configuration, and also shall have the function of being installed downward into the operator's station and control station.

8.2 Structure of Engineer's Operating Stations

8.2.1 Engineer's operating station may be composed of host machine, displayer, engineer's keyboard and printer, etc.

8.3 Technical Requirements of Engineer's Operating Stations

8.3.1 The hardware specification of engineer's operating station shall be 32-bit bus and 32-bit or 64-bit CPU.

8.3.2 It is able to conduct the online/offline configuration of control system and to generate the application program.

8.3.6 The engineer's operating station shall be set with the software protection password for fear that other personnel arbitrarily change the control strategy, application program or system database.

8.3.7 The user interface of configuration software shall be friendly and easy to operate.

9.1 Communication Networks

DCS communication network shall be divided into network layers according to the staging hierarchy of DCS, which may be divided into three layers, including process control network, monitoring and control network and management network.

9.1.2 Basic conditions of network. DCS communication network shall meet the following basic conditions.

9.2 Communication Systems and Clock Synchronization Systems

9.2.1 DCS communication system should be composed of control network, information network, communication interface card and network cable, etc.

9.2.2 DCS communication system should include one set of device clock synchronization system in order to possess the capacity for receiving the clock signals from global positioning system (GPS).

9.3 Communication Between DCS and Other Control Devices

9.3.1 The communication protocols that should be adopted for the communication between DCS and other control devices are. TCP/IP-OPC, HART, MODBUS, PROFIBUS-DP/VI, and FF HSE/H1.

9.3.2 Communication between DCS and other control devices should use the following interface devices.

9.4 Technical Requirements of Communication Networks

9.4.1 DCS local area communication network and its communication sub-networks of all levels shall have redundancy configuration.

Industry Standard of the People's Republic of China Record No.. J1433-2012 Code for Distributed Control System Engineering Design Issued on May 24, 2012 _____ Implemented on November 1, 2012 Issued by. Ministry of Industry and Information Technology of P. R. China Industry Standard of the People's Republic of China Code for Distributed Control System Engineering Design Chief Development Department. China Chengda Engineering Co., Ltd. Approval Department.

Ministry of Industry and Information Technology of the People's Republic of China Implementation Date. November 1, 2012 Beijing, 2012 […]