Problem in hitachi PLC system * The problem description :- The PLC is working normally , but suddenly stop. Why ? We don't know Then it may be recovered itself how and why? We don't know * System details :- Wonderware intouch 8 OS :- computer/windows xp CPU 22-02HC Hitachi H252C 10 Output modules :- POM-RBW . 12 Input modules :- PIM-DGH . 4 Input modules :- PIH-DM . 1 Input modules :- PIM-DGW . 3 power modules :- PSM2-A2 . 1 analog module :- Actana-S1 for Hitachi plc . Actwin 3.44 . i exchanged the cable but no responding What's the suitable solution of this problem ?