Patent ID: 8773438

Claim:
A display system comprising: a display device; and a control device that controls a controlled object, the control device performing a calculation process to calculate a signal value transferred to or from a control component via a signal line during a control process; a display control device that presents the calculation process performed by the control device that controls the controlled object, that displays, on the display device, a control block diagram including the control component and the signal line and a state of the controlled object, and that changes a display format of the signal line in the displayed control block diagram according to the calculated signal value transferred via the signal line during the control process, wherein the display control device sets one or more thresholds by dividing a range within which the signal value transferred via the signal line in the control block can fall and determines the display format of the signal line from the relationship between the thresholds and the signal value, and wherein, when the control component obtains one output signal value from two or more input signal values, the display control device uses a common threshold to determine the display format for each of the input signal values.