| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a distributed control unit capable of transferring/storing a historical file of an HIS to/in a general purpose personal computer (PC) connected to the HIS via an information system network and of managing uniformly a historical message on the side of the general PC. <P>SOLUTION: The distributed control unit consists of an operation monitoring station of a host device connected to a control bus and a field control station of a subordinate device which is connected to the control bus, executes control of field equipment and transmits event information on the field equipment to the operation monitoring station. The device is provided with a storage means for transfer storing the historical file in the operation monitoring station in a historical server of the general purpose PC and a viewer means for viewing the historical file stored in the historical server. <P>COPYRIGHT: (C)2004,JPO</p> |
