Watlow Silver Series - Manual (Page 67)

Using EZware-5000 59
History Data Display
The History Data Display Object is used to display historical data collected by the Data Sample Object in a table
format. Up to 16 channels of data can be displayed from consecutive addresses, and can be any mix of data types
(e.g., 16-bit unsigned, 16-bit signed, 32-bit float, etc.).
Note: The History files section in the Data Sampling Object must have a box checked (e.g., Save to HMI memory) and
a Folder name defined in order for the data files to be stored and displayed in the History Data Display.
The History Control register is used to select the historical data file to display. When the value in the History Control
register is 0, the data for today is displayed in the table. When the value is 1, the data from yesterday is displayed,
etc.
Data Block Display
The Data Block Display Object is used to draw line graphs of the data contained in consecutive registers (up to 1024
consecutive registers). In addition, up to 12 individual sets of data can be displayed in the Data Block Display. The line
graphs can display data in any supported format, but the data in each graph must be of the same format.
The Y-axis scaling is configured on the General tab with the Minimum and Maximum Limit fields (this defines the
bottom and the top of the Data Block Display and should contain the range of data values). The X-axis scaling is
configured on the Display Area tab in the Data Samples field (this defines the number of data samples to plot on a
single screen).
The Control address specifies the address to use to control the selected channel (data set). Each channel has its own
Control Word address. The following values can be written to the Control address to control the plot:
Trigger Value Control Function
1 Draws the plot for the selected channel, leaves existing data.
Can display up to 32 plots for 1 channel, 16 plots for 2 channels, 8 plots for 4 channels, etc.
2 Clears the plot for the selected channel.
3 Clears the plot for the selected channel, then redraws the plot with the current data.
The HMI will write a 0 to the Control Word address after the operation is complete.
If Offset to start address is unchecked, the following addresses are used by the Data Block Display:
Control Word address Draws/clears the plot
Control Word address + 1 Defines number of data points to plot (n = up to 1024)
Data storage start address First data point to plot
Data storage start address + 1 Second data point to plot
Data storage start address + n + 1 Last data point to plot
n = number of data samples
1010-1007, Rev. 10