GE Series One/ DL305 and DL340 CPU

[slyder84]

I am trying to help a guy out who has a 10 slot base with this CPU and cannot manage to connect to program this PLC with DirectSoft32. There has been problems in the past with the data becoming corrupted for some reason and it had to be reloaded then. The power light is all that is lit and run light comes on when all other modules are removed, but still unable to connect. The computer being used is the exact same setup as previous and the CPU has been replaced in attempt to fix the problem. Any ideas?

Thanks

 

[jrwb4gbm]

Just a blind guess here but it sorta sounds like a bad power supply or backplane (rack).

 

[icky812]

I agree. Try putting cards in one at a time to check for a bad card. If the problem persists get a new rack. You can get a replacement from Automationdirect.com.

 

[Steve Bailey]

I would change the rack first. I have identified a "bad" I/O module by installing them one at a time and later found out that the "bad" module worked fine in a new rack. The power supply's performance degrades over time and you may find that the population of I/O modules that won't work in your existing rack will be OK in a new one. I used to work for a GE distributor when the Series One was still around. The single most frequently replaced component was the rack/power supply.