Maple Systems HMI5000 Series - Manual (Page 164)

158 EZware5000 Series Programming Manual
1010-1007, Rev. 10
Creating Trend Displays and Data Sampling Objects
Data Sampling objects can be used to log historical data. Once data is historically logged, it can be saved to the HMI's
internal memory, or to an external memory source such as Compact Flash, USB or a PC.
The Trend Display Object is used to sample the data in a single or multiple 16-bit PLC registers and plot this data on a
time graph. You can configure the Trend Display as a single page or with multiple pages that can be viewed by
scrolling through the pages. The sampling rate and number of plots per page can be customized per trend graph.
You can display a maximum of 20 channels with varying colors to distinguish the channels. Finally, a hold feature
allows you to ‘freeze’ the graph and/or clear the graph.
In order to create a trend object, you must first create one or more data sampling objects from which to sample the
trends.
To create a data sampling object:
1. From the Objects menu, select Data Sampling. The Data Sampling Object Dialog appears.
2. Click New… to create a new data sampling object.