Configures a relational operator used to evaluate this Interlock. Possible values for this property are 0 - coEqualTo: Equal to (default), 1 - coNotEqualTo: Not equal to, 2 - coLessThan: Less than, 3 - coGreaterThan: Greater than, 4 - coLessThanOrEqualTo: Less or equal to, or 5 - coGreaterThanOrEqualTo: Greater or equal to.