Abstract: A redundancy-ready control apparatus, a redundancy system, and a method for configuring redundant logics are disclosed. The redundancy-ready control apparatus includes a plurality of function blocks, a redundancy configuration determining unit, a function block activating unit, and a synchronizing unit. The plurality of function blocks respectively performs a predetermined function. The redundancy configuration determining unit determines function blocks to be included in a redundancy configuration based on the priorities of the respective function blocks. According to the redundancy configuration, the function block activating unit activates the function blocks corresponding to the redundancy configuration to connect power and operational clocks to the activated function blocks, or deactivates function blocks excluded from the redundancy configuration to disconnect power or operational clocks to the deactivated function blocks.