Abstract: Delay in establishing communication is suppressed in a network system including a master device and a slave device. Provided is a setting method for performing communication setting for at least one of a master device and a slave device serving as a target device, the method including a storage step of storing a value of a communication parameter in a state in which the target device has established communication, and a setting step of, in communication setting in a preparatory stage for the target device to start communication, setting the value of the communication parameter that was stored in the storage step.

Abstract: A screen image generation apparatus includes a screen generation unit, a screen display duration database, and a display duration calculation unit. The screen generation unit generates a screen image to be displayed by an external device. The screen display duration database stores an element display duration for each element included in the screen image. The element display duration is a duration taken by the external device before displaying each element. The display duration calculation unit calculates, using the element display duration, a screen display duration taken by the external device before displaying the generated screen image.

Abstract: Delay in establishing communication is suppressed in a network system including a master device and a slave device. Provided is a setting method for performing communication setting for at least one of a master device and a slave device serving as a target device, the method including a storage step of storing a value of a communication parameter in a state in which the target device has established communication, and a setting step of, in communication setting in a preparatory stage for the target device to start communication, setting the value of the communication parameter that was stored in the storage step.