i didnt pick up on was the difference between Hardware and Software and how it pertained to my setup.
Ie. if you used the hardware config it was the USB link i was using to upload the sketch etc.
I did discover it had been working all along, I quickly coupled the circuit together and must have skimmed over the part indicating the LED on pin 11. once inserted the Uno pair started working as expected.
I have a couple of quick questions if you don’t mind.
Im not able to find a way of breaking into the code on the master to allow PC interface/interaction, i want to be able to send and receive serial data from the master.
I have added a second serial connection in the code with a 9600 baud rate and it works at sending and receiving from the master whilst its running the 485 link however i don’t quite understand how to write or read data to be used in the 485 message.
The second question is how to understand the slaves return message, are you able to provide an explanation as to how this is achieved.
as far as i can figure out there is a return response which the master hears and hold LED on pin13 low unless there is a broken link, corrupted message or i guess a time out.