Huh, I just got an old XILIX X915VC2A PLC from some wood processing machine. In my case there is no any sign of life on CRT. Unfortunately ROM chip labels are different so I can not help you.
Backup battery dropped to 1.5V so it may be settup is lost but PLC should give some sign of life on CRT no mather of battery. Now whole machine is dead and useless so if someone can help in any way I will appreciate it much.
Thanks in advance.
P.S. Machine is SCM P170S wood grinder