a controller for executing control processing of a control apparatus, wherein executing the control processing includes controlling operation of a control target;

a calculation circuitry for calculating a control value of the control processing through a plurality of steps of a calculation process;

a first storage circuitry for storing, as execution-time information, an input value being used between steps of a calculation process by the calculation circuitry and an output value of a result being executed thereby;

a second storage circuitry to which an address of the first storage circuitry and an address range thereof are defined in advance where a write-in of an input-output value and a read-out thereof are performed with respect to the first storage circuitry at every respective calculation process by the calculation circuitry, for storing in advance, as normal time information, write-and-read information of the first storage circuitry with respect to an address thereof and to an address range thereof each defined in advance;

an acquisition circuitry for acquiring write-and-read information with respect to an address range defined in advance;

a comparator for comparing said normal time information obtained by the acquisition circuitry with said execution-time information obtained thereby; and

a determination circuitry for determining abnormality when said normal time information compared by the comparator differs from said execution-time information compared thereby each other; wherein

the controller is configured to adjust operation of the control target based on the determination circuitry determining abnormality.