Numerical control system for detecting defects

A numerical control system comprising:

• a numerical controller;
• a control panel of a machine tool;
• and
• a plurality of input/output (I/O) units mounted inside the control panel of the machine tool, the plurality of (I/O) units configured for data transfer between the numerical controller and the control panel of the machine tool;
• a computer aided design (CAD) data storage for storing CAD data for control panel design, the CAD data storage including shape information indicating an external shape and an internal structure of the control panel and mounting information indicating at least a location, an I/O unit inside the control panel being mounted at the location;
• an I/O assignment data storage for storing I/O assignment data recording a connection state of the I/O unit;
• a relevant information storage for recording relevant information between the I/O assignment data and the mounting information of each of the I/O units,
• wherein the numerical controller is configured to:
• control the machine tool to perform machining;
• receive the data from at least one of the plurality of input/output (I/O) units mounted inside the control panel;
• analyze the received data;
• detect, based on the analysis of the received data, a defect occurrence region where a defect of the numerical controller or a defect the I/O unit is occurring;
• and
• control a display to display the defect occurrence region on a shape image of the control panel based on information related to the defect occurrence region, the I/O assignment data, the relevant information, and the CAD data.