Hi, we have a Knuth CNC machine using the Sinumerik system but at this moment it is in defect mode showing alarms 'PROFINET - I/O ramp-up fault type: 1', 'PLC STOP 3', 'Emergency stop', 'PLC sign-of-life monitoring '

I believe it's related to software problem. The problem came after 2 weeks of quarantine, then when the operator came back to work and switched on the machine, these alarms came out.

Thank you in advance for your assistance.