SM400 SM401 Issue

[Andrei Blagaila]

Another day...another problem :(

I have an issue with the software i do not understand. From what I could read the special memory SM400 is always ON and SM401 is always OFF. I Want to figure out if I understood correctly. If SM401 is always off, then the function in the picture is never used right? Or am I missing something? Basically N0 M550 abilitates a part of the program but if it's conditioned by SM401 it will never be used right? PLEASE HELP 

[Gambit]

Correct. This part has been disabled

[Andrei Blagaila]

And if I put SM400 instead of SM401 I re-Enable it right?

I also found in the SW |SM400| ---- |SM401|--------(M***)

This will never be enabled correct?

[Gambit]

Correct on both 

[Andrei Blagaila]

I'm racking up a lot of beers to buy for you :) Thanks again for your help :D