Patent ID: 8803702

Claim:
An instrument status display displaying on a screen, in a tree format, respective indicators corresponding to a plurality of instruments controlled in a hierarchical structure, comprising: an installation time mark acquiring portion acquiring, as an applicable installation time mark, from an installation/removal event history storing portion storing installation/removal event information pertaining to installation/removal of events that occur when an instrument is connected to or disconnected from a system, a time mark when the instrument was connected, where the time mark is the nearest to a prescribed reference time mark without being after the prescribed reference time mark; an alert event acquiring portion acquiring, from an alert event history storing portion storing alert event information regarding alert events produced by the instruments, alert event information for which there has been notification from the instrument during an interval from the applicable installation time mark, acquired by the installation time mark acquiring portion, up until the reference time mark; a display format determining portion determining a display format of an indicator based on the alert event information acquired by the alert event acquiring portion; and a displaying portion displaying, on a screen, the indicator in the display format determined by the display format determining portion.