SLC 5/03 reverts back to old program

[fishenguy]

I have a SLC 5/03 that I made some additions to the program and downloaded it to the processor. It's been running fine for the last 3 weeks, now all of a sudden in the middle of running it reverted back to the old program that doesn't have my updates in it.
Any help would be appreciated.
Thanks and regards, Dave

 

[dmroeder]

It probably has a memory card installed it it. They can be configured to load from the memory card on power up, user initiated or on corrupt memory.

If it does in fact have a memory card, you probably need to download your latest program to the processor, then store it to the memory card. You would do this by going to Comms > EEPROM > Store to EEPROM.

 

[fishenguy]

I did just find the eprom in it. I'll write to it as soon as I get my other laptop back up. Thanks

 

[Ken Roach]

It is very probable that an EEPROM module is installed, and you just went through a power spike that corrupted the memory and caused it to re-load.

It's likely that the conditions that caused the memory corruption have existed for a while, and that they are the reason the EEPROM was installed.

Edit: Too slow !

 

[jkerekes]

Just remember: To write to the EEPROM, the processor has to be in the PROGRAM MODE, it can't be in the RUN mode.

 

[fishenguy]

Problem solved. Thank you very much everyone. I never gave a thought to an eprom. Found it and wrote to it.
Many thanks again,
Dave