What is the structure of the SIS system? What is the SIS system?

The SIS system of the power plant is a system with independent functions between the DCS system and the MIS system.

The ultimate goal of the SIS system construction of the power plant is to minimize the average coal consumption of the whole plant. At present, the R&D of the SIS system is still in its infancy, and the development level of relevant professional technology should be taken into account when carrying out functional planning, and full attention should be paid to the realization of the planning function.

Safety instrumented system belongs to the automation of the production process of the enterprise, a set of systems used to ensure safe production, the safety level is higher than the DCS automatic control system, when the automatic production system is abnormal, SIS will intervene to reduce the possibility of accidents.

DCS distributed control system is a new generation of instrument control system based on microprocessor, which adopts the design principles of decentralized control function, centralized display operation, autonomy and comprehensive coordination. Distributed control system is referred to as DCS, which can also be literally translated as "distributed control system" or "distributed computer control system".

The system is based on the distributed control system and adopts advanced, applicable and effective professional calculation methods to improve the reliability of the unit operation.

DCS adopts the basic design idea of decentralized control, centralized operation and management, and adopts a multi-layered hierarchical and cooperative autonomous structure. Its main feature is its centralized management and decentralized control. At present, DCS has been widely used in various industries such as electric power, metallurgy, and petrochemical.

Safety Instrumentation System (SIS); Also known as safety interlocking system.

It is mainly the alarm and interlocking part of the factory control system, which implements alarm action or adjustment or shutdown control for the results detected in the control system, which is an important part of the automatic control of the factory enterprise.

Peculiarity. 1. IEC61508 is used as the basic standard, which conforms to the safety standards of instruments stipulated by the International Safety Association.

2. It has wide coverage, high safety, and self-diagnosis function, which can detect and prevent potential dangers.

3. Fault-tolerant multiple redundancy system, SIS generally adopts multiple redundancy structure to improve the hardware fault margin of the system, and a single fault will not lead to the loss of SIS safety function.

4. The application is easy to modify, and the software can be modified according to actual needs.

5. The coverage rate of self-diagnosis is large, and the number of points that need to be checked during maintenance is relatively small.

6. The response speed is fast, the response time from the input change to the output change is generally about 10-50ms, and the response time of some small SISs is shorter.

7. It can realize the safety design of the whole circuit composed of sensors and actuators, and has monitoring functions such as short circuit and wire breakage.

SI, i.e. chain brand image. Compared with the CI and VI design boom led by the implementation of brand strategy by large enterprise groups in China, SI is only a store image design and management system implemented for enterprises with a chain franchise nature.

SI is the abbreviation of space identity, called space recognition, or interior identity indoor recognition, it can be regarded as an extension of VI, but the main purpose is in the "three-dimensional space", "decoration standardization" operation, the biggest difference between space recognition and traditional decoration design is that it is a systematic design, rather than a fixed-point design, to adapt to the chain development will encounter the problem of different sizes of each store.

A set of SI system design is divided into 3 types: flagship store design, island store design, and corner store design. After determining the overall design style and props for different types of store design, the main vibration brand design will be planned in accordance with the principle of unified overall display, and the props will be repeatedly displayed and local details will be adjusted to meet the design needs of different types of stores.

What is SI? Which stores need SI? What is the difference between SI design and single store design?

Enterprise terminal image recognition system.

SI, corporate terminal image recognition, compared with the CI and VI design boom led by the implementation of brand strategy by large enterprise groups in China, SI is only for the implementation of chain enterprises and the implementation of store image design and management system.

SI (Space Identity): It is called space identification, store identity or interior identity, and it can also be regarded as an extension of VI, but the main purpose is to work in "three-dimensional space" and "decoration standardization".

The biggest difference between space recognition and traditional decoration design is that it is a systematic design, rather than a fixed-point design, so as to adapt to the problem of different sizes of each store when adapting to the development of the chain.

Hello, the SI system (Store Identity System), that is, the store image recognition system, generally includes the "store concept,

cultural and behavioural identification; Specialty store display system; Store publicity specifications" and other three parts.

The specification design of an SI system consists of several basic principles:

First, it should be consistent with the brand's concept identity (MI) and behavior recognition (BI);

Second, it is necessary to fully consider the adaptability of market positioning;

Third, it is necessary to take into account the multi-dimensional aspects of space, aesthetics, and consumer psychology;

Fourth, it is necessary to extend the application on the basis of the brand visual identity (VI).

The SI system must be coordinated with the VI system, and the store decoration, door head, and main color should strictly continue the specifications of the VI system, so as to effectively convey the brand message, so that consumers can understand the brand from multiple angles and uniformly, so as to promote product sales.

For example, the application of the logo should strictly implement the VI standard, the door head and the image wall need to have unity and continuity, and the auxiliary graphics should also be infiltrated and applied in the store decoration.

dcs: distributed control system;

sis: safety instrumented system.

To put it simply, DCS is to control the entire process in a day-to-day situation. However, when normal operations cannot be controlled, SIS intervenes to reduce the likelihood of accidents.

SIS refers to the plant-level monitoring and information system in electric power, and DCS mainly focuses on it.

In terms of equipment monitoring, SIS mainly focuses on data mining work such as real-time monitoring of plant-wide data and performance calculation and analysis, and does not participate in control. SIS's data** is based on other control systems such as DCS and PLC, and there is no data for SIS alone.

In the chemical industry, SIS refers to the safety instrumented system, which is used for equipment monitoring like DCS, but the fail-safe measures and level of the SIS system are much higher than those of DCS. In the engineering design stage of the chemical project, the hazard and operability analysis will be done, and the analysis results require the safety level of SIL2 and above equipment to be controlled by SIS, and those below SIL2 can be controlled by DCS, PLC, etc. (some requirements are stricter, SIL1 and above are required to use SIS).

DCS --Distribution Control System Distributed control system, factory control level system, routine data acquisition, equipment control are all completed by this system.

SIS--SAFTY Instruments System Safety instrumented system, a kind of interlocking system, is generally used for the safety protection and control of factory process equipment, and sometimes also includes the safety protection control of the unit.

DCS for control, SIS for protection.

DCS is designed to achieve decentralized control and centralized operation.

SIS in order to achieve the integration of management and control.

DCS is a distributed control system, and SIS is a plant-level real-time monitoring system.

SIS is an instrument safety system, a safety equipment facility, and a protective device for safe operation.

DCS is the operating system for the production operation of the device.

SIS: SIS Systems, Safety Instrumented Systems.

SIS system (Safety Instrumented System) belongs to the automation of the production process of the enterprise, a set of systems used to ensure safe production, and the safety level is higher than that of the DCS automatic control system.

The SIS system is based on the distributed control system and adopts advanced, applicable and effective professional calculation methods to improve the reliability of the unit operation.

Extended closed-ruler data:

Peculiarity.

1. The SIS system must use independent sensors, logic standby group solvers and actuators (relative BPCS).

2. The SIS system only acts when a dangerous situation occurs, and usually does not act (problem: accidentally jumping out of the car).

3. The SIS system needs to be optimized between system complexity, maintenance costs, return on investment and safety level.

Hello, I am glad to answer for you, briefly describe the role of the USI module of the SIS system, such as the side limb light: the USI module is generally organic, furnace, electrical, control, auxiliary machine several hungry stupid production links, each professional carrier has a different production division of labor, using different production processes, each process has a number of related control systems, - generally called the underlying system. The unified management of the underlying data, and the secondary use of these data through analysis tools and mathematical models, can help power plants improve production management and improve production efficiency; At the same time, the secondary analysis data can be used in the management information system (MIS) to help the management of the enterprise to make future decisions.

It was these requirements that gave rise to the USI module.