I have nightmares about opening a cabinet & seeing the above. Look closely there is even a cobweb. That PLC is almost as old as I am. My project for the next couple of days is bring this machine into at least the last 2 decades.
Now I have to do a lot of rewiring, a lot of cleaning & a little of the above. Shouldn't be too bad, it will be the 3rd one of these machines I've updated. Practice makes perfect.