TRADE STANDARD
OF THE PEOPLE'S REPUBLIC OF CHINA
中华人民共和国行业标准
HG/T20573-95
Code for Distributed Control System Engineering Design
Issued on August 28, 1995 Implement on November 1, 1995
供配电系统设计Ministry of Chemical Industry of The People’s Republic of China
Document of Ministry of Chemical Industry
HJF (1995) 647
The notification about issuing the professional standard Code for distributed control system engineering design
福山沙纪To the provinces, autonomous regions, municipalities, municipal chemical agencies (bureaus, companies) listed in the state plan, the relevant organizations:
The Code for distributed control system engineering design constituted by China Chengda Chemical Engineering Co., Ltd. under the organization of the Central Station of Automation Design Technology of our ministry has been approved to be voluntary professional standard; the number is HG/T 20573-95. It will enter into force from Nov 1, 1995.
This standard is under the administration of the Central Station of Automation Design Technology of the ministry and will be published and issued under the charge of the Cent
er for Engineering Construction Standard Compilation of the ministry.
Ministry of Chemical Industry
August 28, 1995
TRADE STANDARD
OF THE PEOPLE'S REPUBLIC OF CHINA
中华人民共和国行业标准
Code for distributed control system
Engineering design
分散型控制系统工程设计规定
HG/T 20573-95
Chief Editing organization: China Chengda chemical engineering Co., Ltd.
Approval department: Ministry of Chemical Industry
Implementation date: November 1, 1995
Center for Engineering Construction Standard Compilation, Ministry of Chemical Industry
1995, Beijing
Contents
1 General 5
1.1 Purpose 5
1.2 Scope of application 5
1.3 Referenced standards and codes 5
2 DCS application principle 6
2.1 Necessity 6
2.2 Feasibility 6
3 Basic functions of DCS 7
3.1 Process control function 7
锐意进取 开拓创新 努力提高服务
能力和水平3.2 Operating function 7
3.3 Display function 7
3.4 Alarm function 7
3.5 Tabling and printing function 7
3.6 Information management function 7
3.7 Communication function with upper computer and PLC 8
3.8 System configuration function 8
4 Basic structure of DCS 9
4.1 Operation station 9
4.2 Control station (process interface unit, control unit and data collection unit) 9
4.3 Communication bus 10
4.4 Computer interface of DCS 10
4.5 System configuration station (engineer station) 10
5 Power supply of DCS 12
5.1 External power supply of DCS 12
5.2 Internal power supply of DCS 12
6 Reliability of DCS 13
6.1 Redundancy requirement 13
6.2 Quality requirements for hardware 13
6.3 Interference Immunity 13
6.4 Expansion of the system 13
6.5 Maturity of system software 13
7 Control room 14
8 Cables and wires 15
摄影的意义与价值8.1 Connection method 15
8.2 Selection of conductors 15
8.3 Laying of cables and wires 15
8.4 Wiring method 15
9 Electric grounding 16
9.1 Protective grounding 16
9.2 Shielded grounding 16
9.3 Signal grounding 16
9.4 Intrinsic safety grounding 16
9.5 Special grounding 16
本田crm250
9.6 Grounding, execution material and installation 16
10 Tasks of basic design and engineering design 17
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