REDUNDANCY SYSTEM AND CONTROLLIN METHOD THEREOF

The present specification relates to a redundancy system for operation synchronization and data synchronization between redundancy systems, and a control method thereof. To achieve this, the redundancy system according to the present specification consists of a first system and a second system, which determine whether one of the first and second systems is an active system or a standby system based on a state of the one. The first system operates a first timer included in the active system when the first system is the active system, generates a first interrupt for control operation when a preset timer value corresponds to the time of the first timer being operated, and transmits the generated first interrupt, the preset timer value and a preset delay value to the standby system. The second system receives the first interrupt, the preset timer value and the preset delay value transmitted from the first system that is the active system when the second system is the standby system.