Semantic Warning (SEM2016): The identifier is ambiguous between the variable '... : ... : ...' and the enumeration value '...'. The value of the variable is used.
In a method of a function block, a variable is declared which has the same name as a member of a user-defined enumeration data type. The method-local variable is then called in the method code which generates the warning. The error message indicates the FB instance name, the method name and the variable name as well as the affected enumeration.
This is a warning message to inform you about that important issue. Check the reason for this warning. If it is intended, no corrections are required as reaction to this message.