Control logix plc date & time

[din 0]

Hi, I am using control logix PLC and it is giving wrong date,time & year (7:30:20 1970). But i changed correct date,time & year (2015 1:20:30) in processor by using rx logix 5000 software. After i recycle the PLC power the plc giving wrong date,time & year (7:30:20 1970) . so how i can fix this kindly help me.

[BobLfoot 301]

Couple of quick things to check. 1. Is the Battery OK and Installed Properly if the ControlLogix has one. Some of the newer units don't. 2. Does the PLC have a memory card and is it possibly loading from that on each power up. 3. Can you post the full catalog and/or model number so we have a better idea which control logix you have.