I have "SINUMERIK 840D sl, SINAMICS S120 Alarms Diagnostics Manual" --it is too large to upload here, you can Google it , there wil be all alarms description

BTW, how did your machine system like this, do you know its history ? is there some HW defective ro you replaced somesthing?

did you try to reboot machine and reference all axis , and then set user agreement.

You machine has "Safty Integreted" it need special operation sequency