| 摘要 |
PROBLEM TO BE SOLVED: To reproduce the past operation status of an elevator without increasing the load of a main controller or a display. SOLUTION: A main controller 3 displays on a display 4 the operation status of an elevator received from an elevator controller 1 via traffic statistical device 2. The traffic statistical device 2 includes present status data for the elevator and trace data for storing the status data, if changed, corresponding to times. The past operation status data in the trace data can be read by requesting data from the main controller 3 while specifying a time.
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