I'm heading out the door so not of any further help... Jumping in on this thread...
It looks like a loop back test is needed to see where in the chain that the data is not getting back... if the node is in the init blink mode it reads and the computer and 485 is sending.
I drop all nodes out and loop the in/out +/+ -/- from the 485 converter use a tty program to send and receive from the host computer. If no loop I drop back to the USB (or raw) 232 to loop.
If specific wiring or other help is needed I think someone might be able to jump in.
Jim Albanowski
