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(Solved): Modbus: Display in Hex the Modbus Packet from a master station to an RTU, where: The slave address ...
Modbus: Display in Hex the Modbus Packet from a master station to an RTU, where: The slave address is 22 (decimal). The request is to change the velocity to 9999 (decimal). The offset to the 16-bit holding-register for the velocity is 3 (decimal). The cyclic redundancy check value is computed as OxODFO.
Expert Answer
To construct the Modbus packet in hexadecimal format, you need to follow the Modbus protocol specifications. Here's how you can display the Modbus packet from a master station to an RTU based on the given information:1. Start with the Modbus RTU frame structure: - Slave Address: 22 (decimal) = 0x16 (hexadecimal) - Function Code: In this case, the function code for writing to a holding register is usually 0x06.2. Next, add the data for the write request: - Register Address: The offset to the 16-bit holding register for the velocity is 3 (decimal) = 0x0003 (hexadecimal). - Register Value: The request is to change the velocity to 9999 (decimal) = 0x270F (hexadecimal).