Intermediate frequency electric furnace equipment dual CPU PLC controller

The dual-CPU PLC controller system of the intermediate frequency electric furnace includes PLC, industrial computer (including display), communication network and power supply, and key test points. The important components in the system are all redundant. Two sets of industrial computer and large-screen display are composed of two. The monitoring operation management platform, when the server A has a process connection problem, the server B becomes the main server, continues to communicate, and supplies data to all the clients, and two redundant high-speed communication networks transmit data together; the two sets of DC power supplies together The controller PLC, transmitter and digital input module are powered, and the two test data are set together with the key test points. The redundant design doubles the reliability of key components of the system, resulting in a significant increase in the overall reliability of the system.

From the perspective of reliability, pure hardware redundancy has no advantage over software redundancy. Because of the addition of more components, modules, and the defects of these components and modules, it also affects the reliability of the system. For example, when there is a problem with the fiber optic cable between the two Hot Standby modules, the same will invalidate the redundant control. With software redundancy, only one CPU module is added, and the failure rate of the two CPU modules is almost zero. One of the advantages of pure hardware redundancy is that no special programming is required by the software. The condition monitoring and handling of the CPU are handled by two hot standby modules. In the software redundancy, the condition monitoring and handling of the two CPU modules are solved by software programming. Therefore, software redundancy programming is relatively complicated and requires a lot of work. Moreover, the software preparation cost exceeds the pure hardware redundancy, and the application and protection are troublesome.

Taking into account the above factors, the two CPU modules work together in the system, one running in the main control mode and the other running in the hot backup mode. When there is a problem with any CPU in between, another CPU immediately monitors and issues an alarm, actively putting the normal CPU into the master form. The undisturbed switching of the CPU keeps the system controlled, ensuring safety, and together, the pipeline production line has always been in an excellent working condition.

For more information about the intermediate frequency electric furnace, diathermy furnace and induction furnace of Kunshan Wantai Electric Furnace Co., Ltd., please contact Xiaobian.

Medium frequency electric furnace, diathermic furnace, induction furnace,