TRAIN DOWNGRADE OPERATION METHOD, OC, TACS SYSTEM AND MEDIUM

A train downgrade operation method, an OC, a TACS system and a medium. The method comprises: when an interruption of communication between an OC and a train is confirmed, according to a final position of the train before the interruption of communication and a first positioning point in a first forward direction, determining a first manual route area corresponding to the train; and locking positions of all turnouts provided within the first manual route area, and enabling all turnout signals within the first manual route area to display according to corresponding turnout positions, so as to allow the train to downgrade operation and pass the turnouts within the first manual route area on the basis of display statuses of the turnout signals. L'invention concerne un procédé de déclassement de train, un OC, un système TACS et un support. Le procédé consiste à : lorsqu'une interruption de communication entre un OC et un train est confirmée, selon une position finale du train avant l'interruption de communication