GE 369-HI-0-B-0-0-0-0 On site interface module
To alleviate the communication mission of the CPU, 369-HI-0-B-0-0-0-0-0-0 should select communication processors with different communication functions (such as point-to-point, fieldbus, industrial Ethernet) based on the practical requirements of network composition.
Five standardized programming languages:
There are three types of graphical language: sequential functional diagram (SFC), ladder diagram (LD), and functional module diagram (FBD), as well as two types of textual language: statement table (IL) and structured text (ST).
The programming language used for 369-HI-0-B-0-0-0-0-0-0-0 should adhere to its specifications (IEC6111123). Additionally, 369-HI-0-B-0-0-0-0-0 should support multiple language programming methods, such as C and Basic, to meet control requirements in special control situations.
In the communication network of the PLC system, the communication speed of the superior network should be greater than 1Mbps, and the communication load should not exceed 60%. The primary methods for communication networks in PLC systems include the following:
1. The PC serves as the master station and multiple PLCs of the same type serve as slave stations, forming a simple PLC network;
2. One PLC serves as the master station, while other PLCs of the same type serve as slaves, forming a master-slave PLC network;
3. The PLC network is connected to a large DCS through specific network interfaces as a subnet of the DCS;
4. Dedicated PLC network (dedicated PLC communication network of each manufacturer).
Programming function:
Offline programming method: PLC and programmer share the same CPU. When programming, the CPU only serves the programmer and does not control the on-site equipment. After programming is completed, the programmer switches to operating mode, and the CPU controls the on-site equipment and cannot program.
Offline programming methods can reduce system costs, but they are inconvenient to use and debug. Online programming method: The CPU and programmer have their own CPUs, and the host CPU is responsible for on-site control and data exchange with the programmer within a scanning cycle. The programmer sends the program or data compiled online to the host, and in the next scanning cycle, the host runs according to the newly received program. This method has a higher cost, but is convenient for system debugging and operation, and is often used in large and medium-sized PLCs.
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