This is a sample program of Modbus/RTU master created in Python.
Modbus/RTU communication can be executed by specifying the COM port, setting the baudrate and parity etc.
■ Execution example
py rtumaster.py
■ Screen Image
■ Step to Use
Enter "0" and press the enter key.
In Init, enter the COM port to be used, baudrate, parity bit, data bit, stop bit, and slave ID
to connect with the device.
To input or output via Modbus communication,
please click the button after setting the parameters of each function code.
* Please refer to the following for the function code corresponding to each button.
Example) 0 1 1
In this sample, the maximum number of reading is 2000 bits / 125 words, and the maximum number of writing is 1968 bits / 123 words.
* This is the maximum value of the Modbus specifications.
