By skyforbes 
— Recently, I had an opportunity to work with MODBUS RTU serial communication using RS 485, In which I had faced many issues like error bits, no connection, time-out etc.,
Then I have found this MODBUS DOCTOR — which is Modbus client for debugging our communications. where I could read write to the specific address which I want to write and select the function required for the operation, which helped me a lot in debugging the communication.
This is developed by KScada
How to download Modbus Doctor?
Modbus Doctor can be downloaded from here. Please read the instructions provided in the link before downloading, which is very Important.
This is an Executable software (No need of Installation). Download the software from the link provided and extract the application file (ModbusDoctorV2.exe)
Once Extracted, Double click the file or Right-Click and Open the file, the Modbus doctor application will be opened.
How to Connect Modbus Doctor?
Basically, Modbus needs to be configured in settings, according to the usage of the…