Hi
I have compact logix l23e-qb1b plc. In my plc run, i/o, ok, batt,Dcho all showing status red led on. when i connect the compact logix l23e with pc am using ethernet cable no indication is showing in LNK and NS and also MS red led on. later some time all red status will come to green status.that time cpu get communicated but doesn't show the symbol of cpu only shows yellow question mark. after 2 to 3 seconds it again goes to red status and communication cut. what is the prblm? what can i do for rectify it?