This can be done either way. A MSG instruction in the 1100 (If it supports it which im am sure it does) that writes data or a MSG instruction in the Logix that reads data.
This is up to you. You will need to use "SLC mapping" in the Logix to Bind data types to control logix tags for example N7 is Tag "Data_From_ML110" which is a Int.
Rockwell Forums have SLC to Control Logix Config Examples or visa versa
See attatched Word DOCs
P.S a SLC is virtually the same as a ML in a programming sense