Hello Amine;

"L0.0" is an absolute address used for a TEMP variable (of bool type) in the local stack of a function.

See the great explanation (and illustration) of this addressing by our friend #dp in the following discussion:

https://support.industry.siemens.com/tf//ww/en/posts/stl-in-s7-1500-l0-0/167206/?page=0&pageSize=10

Hope this helps,

Daniel Chartier