RS485 Communication Protocol Tutorial Overview The C320 series inverter provides a standard RS485 communication interface. Users can use PC/PLC to achieve centralized monitoring (send run command settings, inverter working parameters and read inverter working status) to meet specific usage requirements. The protocol content in this appendix is designed to achieve the above functions. 1.1. Protocol Content The serial communication protocol defines the information content and usage format transmitted in the serial communication protocol. These include: host polling (or broadcast) format; host encoding method, including: function code for required action, transmission data and error checking, etc. The response of the slave also uses the same structure, including: action confirmation, return data and error checking, etc. If an error occurs when the slave receives information, or fails to complete the action required by the host, a fault message will be organized as a response to the host.
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