problems with plc 5/40 go online

[DanielABMCC]

We received a repaired 1785-L40B PLC-5/40 processor series c from one of our other plants and I was trying to check it out to see if it was good to put it up in our stock. I stuck it in out test rack and was able to see the processor with Rswho, the light is red on the processor and it show a fault on Rswho. I tried toggling the key to program, run, remote and still has fault. I tried to go online, upload, and even tried downloading a simple sample program with no success. Each time I would do any of these actions I would receive this message, Online Processor is Read Protected! You must Log into a differnt Access Class to go Online. I tried using the password RW on each of the classes but could never go online. Any suggestions would be much appreciated.

 

[Mickey]

Have you tried powering down and pulling the battery out? This will clear the program and return the processor to its default settings.

 

[DanielABMCC]

Yea I tried pulling the battery and had remove from power but still the same thing

 

[Mickey]

Memory module?

 

[DanielABMCC]

No epprom, and switch 8 is set to off on backplane

 

[Ken Roach]

the light is red on the processor

Which light ? I presume you mean the "PROC" indicator. Is it steady red, or flashing ?

If removing the battery and cycling power does not return the controller to defaults, then it is assuredly damaged or defective.

 

[DanielABMCC]

Yes the proc light is steady red