IMAGE FORMING APPARATUS, CONTROL METHOD FOR IMAGE FORMING APPARATUS, AND PROGRAM

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. 【課題】 省電力状態で情報処理装置との通信処理で消費される画像形成装置全体の消費電力量が正確に算出する。【解決手段】情報処理装置と通信する通信手段と、所定の移行条件に従い電力状態を第１の電力状態から、当該第１の電力状態よりも低い第２の電力状態へ移行させる制御を実行する画像形成装置において、最初のパケットの受信応答で消費される電力量を測定しておく。そして、電力状態を第２の電力状態へ移行させた後、第１の電力状態へ移行させる間で消費される電力量を通信手段が情報処理装置との通信で受信するパケットの総数と、上記測定した電力量とに基づいて算出することを特徴とを特徴とする。【選択図】 図８