I am looking at some (Plant Running ) S7 files . Some of them Have logic in OB82. My question is why would somebody added some preotected logic to the system OBs??.
Isn't OB82 sufficent to capture Profibus fault?? Any Idea what kind of logic would be added to OB82??

Thanks

Hi zeratul,

Try this link for an explanation, and further links, from the Siemens web site.

http://support.automation.siemens.com/GB/view/en/19350076

Code that triggers a HMI message "Profibus station either disappeared or reappeared !"