Numerical control apparatus having a restart function at the time of HMI abnormal

摘要

A numerical control device including a CPU for numerical control, a CPU for HMI, a display circuit and a restarting circuit configured to restart the CPU for HMI using the CPU for numerical control. The numerical control device further includes a display task monitoring unit, a determination unit configured to determine an abnormality of the operation condition of the display task by the CPU for HMI, using the display task monitoring unit, and a restarting unit configured to restart the CPU for HMI based on a determination result by the determination unit.