Empty system S4c+

What version is the controller? M97, 98? In other words, S4, S4C?

S4C. The 2 batteries in the first picture are for the controller memory and are the only ones in the controller.

Under what circumstances does this happen? What is its status when it happens?

What is the time interval between checking? Days, weeks, months?

Quote from Firsteverything

sometimes the system is gone

Can you provide more detail on what the controller and teach pendant status is when the "system is gone"? Do you find it with the teach pendant locked up, error messages, asking for key disk … ?

That is the key disk prompt screen that appears after the controller passes its cold start hardware diagnostics. Part of the diagnostics is to measure the controller batteries and it should report them low if the batteries were a problem.

New question: After reloading the system, power the controller off and when turning it back on, does it reboot back to the warm start screen?

I also can't help wondering if someone is cold starting the controller.

Try leaving it off for a longer time and see if it dumps the operating system.

Try reseating the 3 computer boards. Reseating them will dump the operating system. Also be careful of the brittle plastic front covers when trying to pull the boards out.

If none of that works, try replacing the Robot CPU first.

The +15V & -15V from the power supply go to the drives & DC Link. The 39105 is generated by the DC-Link if the +15V is out of tolerance. When measuring the +15V & -15V, also measure with the AC scale - there should be less than 20mV of AC. This is a typical problem with these power supplies.

someone, have a full system for abb s4c, cause the system is corrupt. but i dont have any backup.

it's not so simple ,

what means Sistem is Corrupt ?

be more explicit