Design of Communication Function Test System for Intelligent Low Voltage Electrical Apparatus Based on LabVIEW and Modbus RTU Protocol

On the brief introduction of the characteristics of Modbus RTU communication protocol commonly used in intelligent low voltage electrical apparatus and analyze test requirements of intelligent low voltage electrical apparatus communication function, a design of communication function test system based on LabVIEW and Modbus RTU protocol for intelligent low voltage electrical apparatus is introduced. The system hardware is made up of industrial computer and RS232 / RS485 converter. Introduces in detail the The design and realization of read, write and CRC check software for Modbus RTU protocol communication based on LabVIEW virtual instrument technology development platform is discussed in detail. Practical application results shows that the test system could conduct a comprehensive, safe, reliable detection for intelligent low voltage apparatus communication function, have the advantages of strong anti-interference ability and low cost.