It was indeed the axis 6 wire harness. We ohm tested the wires from one end of harness to the other. Third wire we checked, was bad , would go in and out if jiggling the harness ( at the base ).
After removing the harness and ordering a new one thru ABB ( $1478.00 ) 3HAB7423-1
WE Dug into the wiring and found 1 wire completely broken in two and 2 more very close to the breaking point.
I hope this can save someone a lot of headache and downtime.
Thank you SKOOTER for your input.
AND it turns out we now have a good used SMB should anybody need one
I have an ABB 6400 S4C robot that keeps faulting out mid-program. It trips the following errors:
38031 Resolver Error
39103 Mains Missing
10020 Execution error state
20202 Backplane Enable open
10014 System failure state
20012 Sys failure state active
10005 Program stopped
When this happens, I have to power cycle the robot in order to get it to do anything, and every time I do this, I have to update the rev counter for axis 6
Any help is appreciated, thank you in advance.
DID YOU EVER FIND A SOLUTION TO THIS PROBLEM
I AM HAVING EXACTLY THE SAME ISSUE
I SENT YOU AN EMAIL.......