Greeatings.

I have problem on my machine , on machine I have two siemens plc one cpu 315 and cpu 313 .

This cpu communicate with one PC card in PC is CP5613 A2.COmmunication protocol is MPI.

This work some time , and after some time my pc screen freez.

When i restart machine , i dont have communication beetween station and pc, i must 

setup again pg/pc settings, and restart machine and it work.

Can someone help me to explane what can be problem ?

Hello,

so you want tell us that you're loosing your PG/PC configuration after restart of PC???? What OS on PC and library use as connection to PLC?