ok, I have remove the RS485 converters from Tether,and hook up a Female-Female cable, all LEDs on Operator Interface and Robot controller is GREEN.
You can see this on image.
Sow I can not use a RS485 converters into the Tether port.
I need a longer cable about 100 Meter,how can I do that.
I have talk to
http://www.ifirobotics.com they say I can use a RS485 converters, with RS 485 can you use 1000Meter cabel with only 2 Wire TX- TX+
What shall I do no,to run the 4 speed controllers and the 4 motor, forward,reverse?
you can see on the image I have hook up 2 Analog joystick to control the 4 motor.
I have never do this before.