Cause : SLOT OVERLAP comes when two option modules have same connection interface selection. Ensure that no two modules are physically occupying the same slot.

FF8A fault in ABB ACS800 drive indicates an issue with the configuration of option modules or communication slots in the drive. This typically occurs when two or more modules are configured to use the same slot or address, causing a conflict.

• Check connection interface selections in group 98 OPTION MODULES.