Historical Trending

The Historical Trend module allows on-line analysis of log files. Up to 4 independent value axes can be used to plot up to 8 separate traces, each with its own colour. When detailed analysis is required, a cursor can show the intercept values each trace. Traces can be highlighted, or unnecessary traces removed from the screen and sample markers can show where actual measurements were made. Zooming allows closer inspection of any portion of the logged data by simply selecting the area of interest. The module can even be invoked to read a log file and plot the results on an HPGL plotter without any operator intervention. This feature is particularly useful for automated or unattended operation, where end of batch or end of test reports are called for. The package comes with a utility program which can split up a large log file into smaller ones, filtering the data by time/date or by Pro-Pack point numbers. The utility can also perform the reverse, by amalgamating several log files into one larger one. This allows batch oriented files to be maintained separately, but viewed as a single file for convenience.

Real-time trending

The Real-time trending module provides similar format trend graphs to those offered in the historical module, but operates with real-time data instead of log files. Graphs are scrolled across the screen as the data reaches the right hand side. A 'recent history' facility allows data to be refreshed automatically when the trend screen is exited and subsequently re-entered. The AG300 Animated Graphics Option allows multiple real-time trends to be added to any mimc screen.