SCADA system software function introduction: SCADA (Supervisory Control And Data Acquisition) system, that is, data acquisition and monitoring control system. The SCADA system has a wide range of applications, and it can be used in many fields such as data acquisition, monitoring and control, and process control in power systems, water supply systems, petroleum, chemical and other fields. It is also called telecontrol system in power system and electrified railway. The SCADA system is a computer-based production process control and scheduling automation system. It can monitor and control on-site operating equipment to achieve various functions such as data acquisition, equipment control, measurement, parameter adjustment, and various signal alarms.
Process alarm
Process alarm is the basic function of the process database. The alarm is an early warning of the range and change speed of the measured value. Alarms include limit alarms, rate-of-change alarms, deviation alarms, abnormal alarms, etc. More complex alarms can be generated by performing mathematical operations on the measured values and then performing alarm checks on the results of the operations. After an alarm occurs, the operator can "confirm" the alarm through the alarm screen. "Acknowledge" tells the system that I know what happened, so as not to remind the system again. Alarm information, alarm confirmation information, alarm recovery (alarm elimination) and other information can be automatically recorded by the system. Alarms can be divided into multiple priority levels according to their importance, such as low-level, high-level, and emergency.
When an alarm occurs, the system can notify users in a variety of ways, such as popping up an alarm window, making a sound, and even sending text messages or emails. As for which method to use, the user can freely specify.
History storage
The real-time data can be historically stored. Historical data is very important for the analysis of production conditions, the realization of advanced/optimized control, and the analysis of production accidents, so important process data will be stored in long-term history. In order to save storage media space, the saved data is compressed and saved. Commonly used storage methods include periodic storage and change storage.
The benefits of SCADA system are listed below:
1. Improve efficiency. The development of SCADA generally requires 20 to 100 man-years, and constantly adopts new technologies, absorbs user experience, and continuously improves in use. SCADA integrates the needs of users, extracts common things in the project, and makes corresponding models or modules to help users quickly realize their own projects. Therefore, the use of SCADA can keep up with the development of the times and improve your work efficiency.
2. Consistency. SCADA provides a fixed format that allows users to implement their own projects, some are form-filled, and some are guided. No matter who configures, the same engineering requirements, the resulting configuration results are the same, or the difference is very small.
3. Maintainability. SCADA has powerful internal functions and complex organization, but it is transparent to users. Therefore, the user's configuration workload is not large, or it is only repetitive, so the project is easy to maintain.
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