Future Design MCT-MC 4.3, User Manual

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MCT-MC
4.3
Basic Operation - 59 - FDC MCT-MC
5.6 Process Monitoring
The Loop and Overview screens provide the current process values of the MC. In order to view the process
inputs over time, the MC provides real-time charts. Four user configurable charts are provided with up to eight
plot points per chart.
5.6.1 Charts
The Chart screen is accessed from the home “View” menu. The real-time charts can be configured to display
the process variable (PV), set point (SP) and percentage of output (%) of each control loop over a selectable
period of time. The vertical axis determines the range of displayed data while the horizontal axis determines
the history period. The maximum time period that can be shown in a chart is 24 hours. The MC comes standard
with 4 configurable charts. Each chart includes up to 8 trend lines configurable by the user.
The rate at which the chart plots a new point is based on the time period to be shown. Each buffer can hold a
total of 720 readings for each of the selected channels to plot. The update rate can be calculated by the formula:
time period (in minutes) * 60 / 720. Note that for time periods less than 72 minutes, the update rate will be held
to a minimum of 6 seconds. Thus, the update rate will vary from a minimum of 6 seconds (for time periods of
72 minutes or less) up to a maximum of 120 seconds for 1440 minutes (24 hours).
The
Labels button allows the user to cycle through each of the configured plot channels to determine what
each colored plot represents as well as view the current value without having to return to the Single or Dual
view screens. The left and right scroll buttons at the upper right of the screen allow the user to cycle through
each of the four available charts.
The charts also allow you to “zoom in” on a particular area to have a more detailed look at current data. By
using your finger to select an area on the screen, the chart will zoom in on that area. To select a portion of the
plot, touch and hold the screen with your finger. Drag your finger across the graph and a box will be drawn
around the selected area. Removing your finger from the screen will cause the chart to redraw with only the
selected plot area. To return to the normal view, touch the ‘X’ or ‘Y’ axis and select zoom out to return to the
previous zoom setting or zoom normal to return to the full display.
NOTE:
When a chart is zoomed in, it will not update with new information. The chart must be in normal view
mode in order to update at each time interval. The chart will return to normal automatically when
selecting a different screen to view.