1756-L73 Major Fault

[oldnerd 3]

Have a 1756-L73 processor that was giving a Type 1 code 60 power up fault, on boot. Changed the ESCM module and placed an SD card in. Now after booting it comes up just fine and in about 10 minutes I get a major fault type 1 code 61. I can reload the project and it will run just fine until the next power cycle. Has anyone come across this one before?

[Joe E. 259]

There is a Knowledge Base article that talks about this, if you're using the IOT (immediate output) instruction anywhere in the program:

https://rockwellautomation.custhelp.com/app/answers/detail/a_id/519357

Access Level: TechConnect

The workaround is to remove IOT instructions and uncheck "Disable Automatic Output Processing To Reduce Task Overhead" in the task configuration.

 

Another article talks about codes 60, 61, and 62:

https://rockwellautomation.custhelp.com/app/answers/detail/a_id/278692

Access Level: TechConnect

That one says to contact Rockwell tech support after the fault occurs with the SD card installed.