Industrial controllers, as the core equipment in the field of industrial control, its role and positioning in the industrial control system is crucial. When exploring the question of whether an industrial controller is an upper or lower computer, we need to deeply understand the concepts of upper and lower computer and analyze them in the light of the characteristics and application scenarios of industrial controllers. In this paper, we will discuss in depth the positioning of industrial controllers in industrial control systems from the definition of industrial controllers, characteristics, application scenarios, and the concept of the host computer and the host computer and the concept of the lower computer and other dimensions.
First, the definition and characteristics of industrial control machine
Industrial control machine (Industrial Personal Computer, IPC), that is, industrial control computer, is a bus structure, the production process and electromechanical equipment, process equipment for detection and control of the tool in general. It has the basic attributes and characteristics of a computer, such as motherboard, CPU, hard disk, memory, peripherals and interfaces, and run the corresponding operating system. Industrial controllers are characterized by stability, reliability, embeddedness and intelligence in industrial environments, providing stable and reliable industrial computer solutions for various other industries.
The main categories of industrial controllers include IPC (PC bus industrial computer), PLC (programmable control system), DCS (decentralized control system), FCS (fieldbus system) and CNC (numerical control system). These different types of industrial control machine in the industrial control system plays a different role, together constitute a complete industrial control system.
Second, the concept of the upper computer and the lower computer
In a distributed control system, the upper and lower machines are two important concepts. The upper machine is the host responsible for control and management, usually running the upper machine software, providing user interface and human-computer interaction functions, used to monitor and control the operation of the lower machine. The lower computer is the slave device controlled and managed by the upper computer, which is responsible for collecting sensor data and performing control tasks. Between the upper and lower computer through the communication interface for the transmission of data and the receipt of instructions to achieve the interaction with the upper computer.
Third, the positioning of industrial controllers in the industrial control system
The positioning of industrial controllers in industrial control systems depends on their application scenarios and the tasks they undertake. To a certain extent, industrial controllers can be used as both upper and lower computers, depending on their specific roles and functions in the system.
IPC as a host computer
When an industrial computer acts as a host computer, it mainly undertakes the tasks of control and management. By running the upper computer software, the industrial controller provides a graphical interface or command line interface to interact with the operator, providing parameter settings, monitoring data and alarm functions. At this time, the ICPC is responsible for receiving data from the lower computer and processing, analyzing and displaying it. At the same time, the industrial controller can also send control commands to the lower computer to realize remote control and management of field equipment.
For example, in an industrial automation production line, the industrial controller can act as the upper computer and communicate with the PLC (lower computer) to realize real-time monitoring and management of the production process. Through the interface of the IPC, the operator can clearly see the running status of the production line, production data and other information, and can remotely control the production line through the IPC.
IPC as a lower computer
In some application scenarios, the industrial computer can also be used as a lower computer. In this case, the industrial controller is responsible for collecting data from the on-site equipment and sending the data to the upper computer after necessary pre-processing. At the same time, the industrial computer also needs to perform the corresponding control tasks according to the instructions of the host computer.
For example, in the environmental monitoring system, the industrial computer can be used as a lower computer to collect environmental data (such as temperature, humidity, PM2.5, etc.) through sensors and send the data to the upper computer for processing and analysis. At the same time, the industrial computer also needs to control the corresponding equipment (such as humidifiers, air purifiers, etc.) for environmental adjustment according to the instructions of the host computer.
Fourth, summarize the summary
To summarize, the industrial computer in the industrial control system can be used as both the upper computer and the lower computer. Its positioning depends on the specific application scenarios and tasks undertaken. Whether as the upper or lower machine, industrial controllers play an important role in providing strong support for the stable operation and efficient management of industrial control systems. Therefore, when designing and constructing industrial control systems, it is necessary to choose the appropriate type of industrial controller and configuration program according to the actual needs to ensure the stability and reliability of the system.