Overview Of Seven Major Process Industry Instrument Control Systems

The process industry instrument control systems include: Distributed Control System (DCS), Safety Instrumented System (SIS), Gas Detection System (GDS), Fire Alarm System (FAS), CCS/PLC/MMS, Tank Measurement System (TGS), and other systems such as AMS/AMADAS/APC/SCADA/CCTV.

What specific intelligence do these systems carry, and what are the high-quality suppliers both domestically and internationally?

Distributed Control System (DCS)

DCS Architecture

Overview Of Seven Major Process Industry Instrument Control Systems

DCS Contractor Supply and Scope of Work

Hardware: Wiring cabinets, system cabinets, operator stations, engineer stations, servers, networks;

Software: Configuration software, controller runtime software, operator software, historical trends, etc.;

Services: Cabinet hardware design integration, software configuration.

Common Brands

International: Yokogawa, Honeywell, Emerson, ABB, Siemens, Schneider (Foxboro), Metso, others;

Domestic: Zhejiang Zhongkong, Heli Shi, Nanjing Keyuan, Guodian Zhishen, GE Xinhua, others.

Safety Instrumented System (SIS)

SIS Composition and Characteristics

The Safety Instrumented System consists of sensors, logic solvers, and final control elements, which are the detection unit, control unit, and execution unit.

The SIS can monitor potential or existing hazards during the production process, issuing alarm information or directly executing predetermined procedures, immediately entering operation to prevent accidents and reduce the harm and impact of accidents.

Overview Of Seven Major Process Industry Instrument Control Systems

SIS Contractor Supply and Scope of Work

Hardware: Wiring cabinets, system cabinets, operation panels, engineer stations, networks;

Software: Configuration software, controller runtime software, others;

Services: Cabinet hardware design integration, protection logic software configuration.

Common Brands

International: TRICON/HIMA/Yokogawa, Emerson, Honeywell, GE, etc.;

Domestic: Kangjisen, Zhongkong, Heli Shi.

Gas Detection System (GDS)

GDS Composition and Characteristics

Overview Of Seven Major Process Industry Instrument Control Systems

Typical Solutions for GDS

Reference:

“GB50493-2019 Design Standards for Detection and Alarm of Combustible and Toxic Gases in Petrochemical Industry”

5.4.1 The alarm control unit should be an independently set microprocessor-based electronic product and should have the following basic functions:

1 Can supply power to combustible gas detectors, toxic gas detectors, and their accessories.

2 Can receive output signals from gas detectors, display gas concentration, and issue audible and visual alarms.

3 Can manually eliminate audible and visual alarm signals and still issue alarms when an alarm signal is input again.

4 Has relatively independent, non-interfering alarm functions and can distinguish and identify the location number of the alarm site.

5 The alarm control unit should be able to issue audible and visual fault alarm signals that are clearly distinguishable from combustible gas and toxic gas concentration alarm signals under the following conditions:

1) A break or short circuit in the wiring between the alarm control unit and the detector.

2) The main power supply of the alarm control unit is under voltage.

3) A break or short circuit in the wiring between the alarm control unit and the power supply.

6 Has the following recording, storage, and display functions

Fire Alarm System (FAS)

FAS Composition and Characteristics

Overview Of Seven Major Process Industry Instrument Control Systems

Common Brands

International: Siemens, Honeywell (NOTIFIER);

Domestic: Shouan, Lida, Gulf.

CCS/PLC/MMS

CCS/PLC/MMS Composition

Overview Of Seven Major Process Industry Instrument Control Systems

Common Brands

PLC: Siemens, AB, Schneider, GE, Heli Shi, Zhongkong, Mitsubishi, Panasonic, Omron, Delta;

CCS: CCC, TRICON, Zhongkong;

MMS: Bentley, EMERSON, Shanghai Jinj, Beijing Palis, etc.

Tank Measurement System (TGS)

TGS Composition

Overview Of Seven Major Process Industry Instrument Control Systems

Field instruments: Radar level meters/steel tape float level meters/static pressure level meters/multipoint temperature transmitters/tank side display instruments;

Data acquisition systems: Data collectors, upper computer management software.

Common Brands

EMERSON/HONEYWELL(ENRAF).

Other Control Systems

Other common control systems include: AMS (Advanced Management System), AMADAS (Analyzer Data Acquisition and Management System), APC (Advanced Process Control), SCADA (Supervisory Control and Data Acquisition), CCTV (Closed-Circuit Television Monitoring System), etc. Different industries and scenarios apply different systems, and the demands may vary.

(Deputy Director of the Electrical Control Room, Beijing Branch of China Global Engineering Company Wei Yi)

Source: Instrument Circle

China Chemical Safety Association

Editor: An Kang

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