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Chapter 4
Human Machine Interface
4-6
© National Instruments Corporation
Display event 
history information
Event History 
Display or any Table 
Indicator 
Invoke the HMI G Wizard on a table indicator to 
obtain a history of past events and alarms (Event 
History). For an event history display, you can set 
the HMI G Wizard to Event History mode by 
setting the value of the Use this Indicator for: 
ring to Event History. You can select a set of tags 
whose history needs to be displayed. You also can 
set colors of acknowledged and unacknowledged 
alarms, normal and event entries, and column 
format of the summary. Preformatted event history 
indicators are contained in the Alarms and Events 
palette. 
Display a real-time 
trend
Real-Time Trend or 
Waveform Chart 
Indicator
Invoke the HMI G Wizard on a real-time trend or 
waveform chart indicator to select a set of tags for 
which the values need to be displayed in a chart 
(real-time trend).
Display a historical 
trend
Historical Trend or 
XY Graph Indicator
Invoke the HMI G Wizard on a historical trend or 
XY graph indicator to select a set of tags for which 
the values need to be displayed in an XY graph 
(historical trend).
Table 4-1.  HMI G Wizard Operations (Continued)
HMI Function
Front Panel Object
Description