Numerical control device

A numerical control device including a control unit, wherein

• the control unit includes:
• a task management unit that manages a task group including at least a first group of tasks that execute a machining program that machines a work and a second group of tasks that do not execute the machining program but execute during the machining and execute on a background of the first group of tasks that execute the machining program;
• an interrupt notification unit that monitors system data set to an interrupt condition designated in advance and outputs an interrupt command upon detecting that the interrupt condition is satisfied;
• and
• an interrupt processing unit that interrupts and suspends the tasks being executed among the task group at a time point when the interrupt command was received and suspends the first group of tasks and the second group of tasks included in the task group to execute a predetermined interrupt program as an interrupt with a highest priority on the basis of the interrupt command output by the interrupt notification unit, and thereby obtain a value of arbitrary system data including a value of a signal designated in advance, a value of a variable designated in advance, or an offset value designated in advance, when the interrupt is executed.