This is just a record for those who care about the slow machine h1ecatc1.
I was playing with h1ecatc1 this evening around 18:10. I got an error message when I tried logging in PLC2. The message said 'Page Fault. PLC is stopped.' Obviously PLC2 wasn't running, so I recovered it by clicking the 'reset' button in the 'online' tab and then clicking the 'run' button. It seems running OK right now.