| 摘要 |
PROBLEM TO BE SOLVED: To accurately calculate the amount of power consumption of an entire image forming apparatus that is consumed in a communication process with an information processing device in a power saving state.SOLUTION: An image forming apparatus includes communication means for communicating with an information processing device, and performs control for shifting a power state from a first power state to a second power state which is lower than the first power state, according to a predetermined shift condition. The amount of power that is consumed in reception response of a first packet is measured in advance. After a power state is shifted to the second power state, the amount of power consumed during a period of shifting to the first power state is calculated based on the total number of packets that is received by the communication means through communication with the information processing device and the amount of power that has been measured. |
