s4c+ robotic weld cell, IRB1400 M2000. Ferris wheel style positioner. I am getting error code 20206 and 20208 on a regular basis, I think I have a light curtain fault but what is odd is that when I get the weld controller ready to run(key in auto, motors on and press start) when I go around to the operator side and reset the light curtains the machine faults out with 20206. you have to step into the light curtains to reset them, anyone got any info on this problem?
thanks