Modbus user-defined function code

I am using modbus communication supported by Instrument Control Toolbox. The problem is my modbus slave has a user-defined function code 28 and I cannot find a possible way to send the command including the function code 28. The command I want to send should be like "01 28 ...", can anyone remind me of a way to do this?

[Tianji Gao]

To be specific, I want to find a matlab function that can send binary data over a modbus object.

[Tianji Gao]

The only solution I can think of is to delete the modbus object, create a new serial object and use write() function to communicate.

Answer 1

[Pranav Verma]

Hi Tianji,

Here is the list of all the MODBUS communication functions supported by MATLAB. You can refer to the below add-on to check if it helps:

Modbus RS232 ASCII Communication Functions

Thanks