Yesterday I edited the ALS diff guardian in order to add new states which automatically find an IR resonance. The requestable state is called IR_FOUND. The concept is the same as that of ALS comm. It tries two specific DARM OFFSET places and checks the arm build up in Y arm. If it doesn't find a high buildup, it times out and falls to a failure state, called NO_IR_FOUND. At this point the user should manually find a resonance to get out of this state.