DATA STORAGE DEVICE OF OPERATING MACHINE

PROBLEM TO BE SOLVED: To provide necessary and sufficient information by efficiently storing operating data. SOLUTION: This data storage device of an operating machine is provided with: data acquisition means 2 and 3 acquiring operating data changing in response to an operating condition; first and second storage means 12 and 13 storing the operating data acquired by the data acquisition means 2 and 3 in a predetermined period; an instruction output means 1 outputting a data storage instruction; a data storage means 15 storing operating date in response to the data storage instruction; and a control means 16 controlling the respective storage mans 12, 13 and 15 to store the operating data in the first storage means 12 in the first period, store the operating data in the second storage means 13 in a second period longer than the first period, and store the data stored in the first and second storage means 12 and 13 in the data storage means 15 when the data storage instruction is output. COPYRIGHT: (C)2009,JPO&INPIT