Figure 5.6.1 – Cycle Data Charts
Above the charts to the right are averages for the cycle time and thermocouple (temperature) values being recorded on the equipment. If other data tags are being collected for the equipment (i.e. from the analog input), the average for that tag will be shown here as well.
Above the charts and to the left are scale settings for the y axis on each chart, as well as a checkbox to combine the charts. Whether or not to combine the charts is usually a matter of personal preference, but may make it easier to correlate data trends. The data itself does not change when the charts are combined as it does with the time filters, just the y-axis scale (discussed next).
There are several settings for the y-axis scaling, including None for no scaling, and the default is 3. The scaling is based on the standard deviation. The standard deviation and the mean are calculated based on all of the data in the chart, and then the scaling is set at the mean +/- scaling * standard deviation. This creates a window around the mean, and no data points outside that window will be displayed. Note that this setting only changes the y-axis chart scaling, and not the averages above the charts.