Device Health Indicator And Details; Graphical Items In A Device Interface - Honeywell MCT404 User Manual

4. Managing HART Devices using FDC Application Software
4.6. Online configuration

Device Health Indicator and Details

Using the standard features of the HART communication protocol FDC provides an indicator of the
device's health through a LED indicator on the title bar of each page. Quite often the details of such
health indicators are available through different variables under different menus. FDC however provides
an entry point on the functions tab to view the details of the device health indicators.
The Device Status entry point under the functions tab provides the details of device as under:

Device status: Indicates the current status of the device with respect to different standard parameters
such as process value, analog output, device malfunction and power reset etc. This also indicates if
the device has more detailed status information available that may need attention.

Communication status: Indicates the details of communication errors that might have occurred
with communication to the device.

Extended Device Status: Each HART device has a set of variables which can indicate an extended
status for the device and its health. The numbers, labels and descriptions of such variables varies
from device to device. FDC simply presents such variables to you as defined in the DD file. So if the
Device Status has an indication that there's more status available for the device, these are the
variables you should investigate for further details.
Perform the following steps to view the details of device health.
Note: For example, consider the following scenario.
1. On the Device Home page, tap Functions tab.
2. Under the Functions tab, choose Device Status.
The Device Status page appears.
3. From the drop down list select any of the variables to view the details.
4. Tap Return to close the Device Status page and return to the Device Home page.

Graphical items in a device interface

Devices using the Electronic Device Description Language (EDDL) constructs often enable you to view
the device data as graphical/visual representation. These constructs are described in subsequent sections.
Graphs
A graph is a visual representation of the device data plotted with reference to a set of axes. A graph has a
common x-axis for all the data plotted. Each graph has one or more static curves obtained by joining the
plotted pair of data points. Such curves are called as Waveforms. A set of waveforms may share a
common Y axis. Based on the DD file, different colors for the waveform and axes are displayed. In
addition, you can edit the waveforms and view the legends.
To view a graph, perform the following steps.
1. On the Device Homepage, tap on Functions tab.
2. Tap on Online > Select.
3. The Device Configuration screen appears which displays the top and bottom panes.
4. Navigate to the desired menu. The bottom pane will display items under that menu Select any graph
from the list of available graphs which appear on the bottom pane.
5. Tap on View.
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