The information processing apparatus analyzes a machining program, determines whether or not there is a block fulfilling conditions for grouping that are registered in advance in the machining program, and if present, specifies the range of blocks to be grouped according to the grouping conditions, and performs simplified display for the plurality of consecutive blocks that have been grouped on a screen.

A display device for a machining program has a function of displaying a modal state. The display device includes a program analysis unit that inputs the machining program and that identifies an attention block in the machining program, a modal effective range analysis unit that identifies a modal state that is effective in the attention block and an effective range of the modal state, and a modal effective range display unit that visually displays the effective range of the modal state along with the machining program.

The information processing apparatus analyzes a machining program, determines whether or not there is a block fulfilling conditions for grouping that are registered in advance in the machining program, and if present, specifies the range of blocks to be grouped according to the grouping conditions, and performs simplified display for the plurality of consecutive blocks that have been grouped on a screen.

A display device for a machining program has a function of displaying a modal state. The display device includes a program analysis unit that inputs the machining program and that identifies an attention block in the machining program, a modal effective range analysis unit that identifies a modal state that is effective in the attention block and an effective range of the modal state, and a modal effective range display unit that visually displays the effective range of the modal state along with the machining program.

A machining program editing assist apparatus includes a display controller. While the display objects are being displayed in either one of the program data display area and the process list display area, the display controller decides that a designated display object of the one of the display areas is the display object designated by the display objects of the one of the display areas and a specific point, differentiates the designated display object from the other display objects in the one of the display areas, decides that a designated display object of the other of the display areas is the display candidate of the other of the display areas, includes the designated display object in the display objects of the other of the display areas, and differentiates the designated display object from the other display objects in the other of the display areas.