Configures a relational operator used to evaluate this Interlock. Possible values for this property are 0 - wcoEqualTo: Equal to (default), 1 - wcoNotEqualTo: Not equal to, 2 - wcoLessThan: Less than, 3 - wcoGreaterThan: Greater than, 4 - wcoLessThanOrEqualTo: Less than or equal to, or 5 - wcoGreaterThanOrEqualTo: Greater than or equal to.