To prevent a timer buffer from being occupied due to its use whose frequency is small, and to use a released timer buffer # regardless of its use.

This device is provided with a hardware timer 11 having plural counter parts (timer buffers) in which all the timer buffers are updated in a prescribed cycle by hardware 10, timer management application 15 for operating the allocation and release of the hardware timer according to an instruction from software, and accepting interruption from the hardware 10 at the time of the generation of the time-out of the hardware timer 11, and empty timer management table 16 in which the empty state of the timer buffer is stored and updated by the timer management application 15.