HG/T 20573-1995 Distributed control system engineering design regulations
Some standard content:
Document of the Ministry of Chemical Industry
Chemical Construction Development (1995) No. 647
Notice on the issuance of the industry standard "Regulations on Engineering Design of Distributed Control Systems"
To the chemical industry departments (bureaus, companies) of all provinces, autonomous regions, municipalities directly under the Central Government, and cities with independent planning status, and all relevant design units:
The "Technical Regulations on Engineering Design of Distributed Control Systems" formulated by China Chengda Chemical Engineering Company, organized by the Automatic Control Design Technology Center of our Ministry, has been reviewed and approved as a recommended industry standard with the number HG/T20573-95. It will be implemented from November 1, 1995.
This standard is managed by the Automatic Control Design Technology Center of the Ministry; and published and distributed by the Ministry's Engineering Construction Standards Promotion and Editing Center. Ministry of Chemical Industry
August 28, 1995
Industry Standard of the People's Republic of China
Regulations on Engineering Design of Distributed Control Systems
HG/T 20S73-95
Editor: China Chengda Chemical Engineering CorporationApproval Department: Ministry of Chemical Industry
Effective Date: October 1, 1995Editing Center for Engineering Construction Standards of the Ministry of Chemical Industry
Scope of Application·
1.3: Referenced Standards and Specifications
2: Principles for Adopting DCS
.2.1. Necessity
2.2: Feasibility
Basic Functions of DCS
Process Control Function
Operation Function·bZxz.net
Display Function·
Alarm Function
Tabulation and Printing Function
Information Management Function
Table of Contents. ·Second
Communication function with host computer, PLC, etc.
System configuration function
Basic composition of DCS
Operation station
Control station (process interface unit, control unit and data acquisition unit)·4.2
4.3Communication bus·
4.4Computer interface of DCS
4.5·System configuration station (engineer station)
5DCS power supply
5.1DCS external power supply
|.2DCS internal power supply
6 DCS Reliability
(3)
(3)
(5)
(5)
(7)
(8)
6.1 Redundant requirements-
:6.2 Hardware quality requirements
6.3 Anti-interference performance
System expansion
System software maturity
Control room·
Cables, wires||tt ||Wiring method·
Conductor selection·
Cable and wire laying
Wiring method
Electrical grounding·
Protective grounding
Shielding grounding·
Signal grounding·
Intrinsically safe grounding·
Special grounding
Grounding, manufacturing materials and installation
Basic design and engineering design tasks
Basic design stage Section
Engineering design stage
11DCS application software configuration
11.1DCS supplier configuration
11.2DCS user configuration
12DCS inspection, installation and commissioning
12.1DCS inspection
12.2Installation and commissioning
13Preparation of DCS technical specifications
13.1Function of technical specifications
13.2Time for preparing technical specifications
13.3Main contents of technical specifications
(17)
Appendix ADCS engineering design procedure
Appendix B
Outline for preparation of DCS technical specifications
Preparation instructions
This regulation is for the design of chemical automation engineering using distributed control systems: (Distributed Control Systems) The technical regulations formulated by the DCS (hereinafter referred to as DCS) are to help designers correctly and reasonably adopt DCS and give full play to the advancedness, practicality and reliability of DCS.
1.2 Scope of application
These regulations apply to the following scope of work in DCS engineering design: 1. 2. 1
Discuss the implementation plan of the process monitoring system; draft the preliminary configuration of the DCS hardware system;
Prepare the DCS technical specification;
Review the DCS quotation;
Submit the external design conditions for DCS installation and commissioning; complete the design documents required for DCS application software configuration and other work. 1.3 Referenced standards and specifications
ZBN 10008--89
Terms of distributed control systems
ISA--S5.1-1984"Graphic symbols and text codes for instruments" HG20505--92
"Graphic symbols and text codes for process detection and control systems"
HG 20508--92
HG 20509-- 92
HG 20512-92
HG 20513--92
《Control Room Design Regulations》
《Instrument Power Supply Design Regulations》
《Instrument Piping and Wiring Design Regulations》
《Instrument System Grounding Design Regulations》
2. Principles for DCS Adoption
Before deciding to adopt DCS, the following principles should be comprehensively considered from the aspects of necessity and feasibility of adopting DCS.
2.1 Necessity
2.1.1 The process flow is long, and there are many detection and control loops. The adoption of DCS can give full play to its characteristics of large capacity and strong functions.
2.1.2 The process control scheme is more complex, there are more advanced control systems, and the safety and reliability requirements are higher. It is not easy to meet the process operation requirements by using conventional analog instruments. 2.1.3 The requirements for operation management functions are higher, such as printing of operation and over-limit alarm data, making cost accounting, technical and economic indicators analysis reports, etc. 2.1.4 The adoption of DCS is beneficial to improving production efficiency and product quality. Feasibility
The process production technology is mature and the design experience is rich, which is conducive to the reliable investment of IDCS. 2.2.2 The technical strength of the end user of DCS is strong and has a certain level of operation, maintenance and management.
2.2.3 Compared with conventional analog instruments, the investment in DCS has reasonable technical and economic indicators, and the end user has the ability to invest funds.
3 Basic functions of DCS
DCS has rich functions. When designing and selecting, and configuring the system, the rational and effective implementation of the following functions should be focused on.
3.1 Process control function
In engineering design, in addition to the basic feedback control function and sequential control function, advanced control functions such as cascade, ratio, feedforward, overrun, and pure lag time compensation can also be correctly selected according to the actual needs of process monitoring. In addition, various operation units can be used to form a comprehensive control formula to achieve more complex control requirements. 3.2 Operation function
According to the operation needs and the operation modes of various DCS, you can choose a common operation station that only uses a keyboard to realize the operation of the production process, or you can choose an operation station that uses a keyboard, a ball mark (mouse), or (and) a touch screen to realize the operation of the production process. 3.3
Display function
According to the general display, group display, single point display, historical trend display, alarm point summary display, and dynamic simulation process display functions of DCS, according to the principle of convenient observation and simple operation, reasonably arrange the group display, trend display, dynamic process display and other screens. If necessary, you can also choose the display operation function of opening a window on the process surface4
3.4·Alarm function
The system alarm function of DCS should be able to automatically diagnose the faults caused by the operation station, field control station or communication system, and send out an alarm signal. The process alarm function of DCS should be able to detect the abnormal state of the production process and display the alarm signal on the CRT screen. For important alarm signals or system interlocking signals, a separate alarm panel can also be selected (some DCS do not have an alarm panel structure). If necessary, an audible alarm device can also be configured.
If necessary, a flash alarm installed on the auxiliary operation table can be selected. 3.5 Tabulation and printing function
Report printer and real-time alarm printer should be selected respectively. Report printing: It can be printed regularly according to the report format, content and printing cycle determined by the end user, or it can be printed at any time as needed. Alarm printing: The position number, time and alarm working condition of all alarm points should be printed in real time
3.6 Information management function
According to the needs of process operation and management, select external storage (such as disk, tape drive) to save more important information. The type and capacity of external storage can be determined according to the amount of information to be saved, the length of time to save, and whether there is enough margin. 3.7 Communication function with host computer, PLC, etc. According to the needs, DCS can be required to communicate with the host monitoring computer to perform optimization control and production management functions, or DCS can be required to communicate with program logic controller (PLC) 5
to perform complex sequential control and signal interlocking functions. When DCS and host computer are not configured synchronously, DCS can be required to be equipped with a communication interface with the host computer. 3.8 System configuration function
A DCS with offline and online system configuration functions should be selected. The system configuration function should include the configuration, generation and modification of the monitoring function of the operation station and the control function of the control station.
. Basic composition of DCS
DCS mainly consists of three parts: operation station, control station and communication system. The following matters should be considered during design and selection.
Operation Station
4.1.1 A 19″ or 19\ or more color cathode ray tube display (CRT) with an operation keyboard should be selected to provide different viewing and operation functions for operators, engineers and DCS maintenance personnel. The number of CRTs with operation keyboards (hereinafter referred to as human-machine interfaces) should be configured based on the scale of the detection and control system, the specific requirements of operation and monitoring, and factors such as redundancy. In general, the configuration of human-machine interfaces can be selected according to the following range. 4.1.1.1 2 sets can be configured for less than 50 control systems. 4.1.1.2 2~4 sets can be configured for 50~100 control systems. 4.1.1.31 4.1.1.4·150~~200 control systems can be configured with 5~7 sets. 200 control systems or more can be configured with appropriate human-machine interfaces according to the operating characteristics of the process equipment.
4.1.2 A disk drive (including floppy disk and hard disk) or CD-ROM drive should be configured for system configuration, generation and downloading, as well as for saving various programs and data. A tape drive can be configured when necessary.
A report printer and an alarm printer should be configured separately. 4.1.3
A color copier or color laser printer can be used when necessary. 4.15
A multi-pen trend recorder can be used when necessary.
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.