Instrument status displaying device and instrument status displaying method

摘要

An instrument status display displaying on a screen, in a tree format, respective indicators corresponding to instruments controlled in a hierarchical structure, having an installation time mark acquiring portion acquiring, as an applicable installation time mark, a time mark that is nearest to a reference time mark without being later than the reference time mark, where the time mark is a time mark for the connection of an instrument, from an installation/removal event history database; an alert event acquiring portion acquiring alert event information notified from an instrument over the interval from the applicable installation time mark, acquired by the installation time mark acquiring portion, up until the reference time mark; a display formatter determining a display format of an indicator based on alert event information; and a displaying portion displaying, on a screen, an indicator in a display format determined by the display formatter.