This read-write setting commits a fully configured fault relay entry into active operation (active), leaves it mid-edit (configuring, reported by the system automatically), or disables it (notActive). An admin must set this to active after configuring the relay's condition settings, since the relay won't actually monitor or trip until this final step is completed. For example, writing active(1) here after configuring faultSelection as pingFailure and setting pingFailureIP actually arms that relay entry so it begins monitoring and can physically trip if the ping target becomes unreachable.