Using fieldbus technology in the inverter

Entering state initialization receiving code register initialization receiving mask register initialization bus timing register initialization output control register allows receiving interrupts, clearing reset request initialization command register data transmission program information transmission from the controller to the bus is automatically completed by the controller. The sending program only needs to send the sent information frame to the sending buffer and start the sending command. The receiving program information is automatically completed by the controller from the bus to the receiving buffer. The receiving program only needs to read the information to be received from the receiving buffer.

Inverter software design Inverter software uses a functional module approach. The inverter software consists of main program, interrupt service program, display subprogram, control subprogram and related subprograms. The main program block diagram of the inverter is shown in the figure. The main block diagram of the inverter. Conclusion After the development of the bus-based inverter, the practice test shows that the control system composed of two single-chip computers and dual ports has a reasonable design structure and response speed. Fast, simple operation, low cost, small failure rate, small maintenance, suitable for full digital control of AC motors, and can also be used as a test platform for various speed control schemes; the use of dual ports solves the data between the two machines A large number of fast two-way transmission, high reliability, small board area, and a good price-performance ratio; especially when the inverter is connected to other control systems or networks, it shows its superiority. Therefore, the use of fieldbus technology in the inverter is a development direction of the inverter. The frequency converter with bus interface has high stability, high reliability and practicality. Its successful development has brought considerable social and economic benefits.