Example. Pdf

Access name definition dialog.
Network Variable Monitoring
The 
Monitoring NVs
window is the main window of the example application. It shows simple
animation examples for monitoring the three main network variable types used by the LonPoint
system (and many other L
ON
W
ORKS
applications). The top frame shows digital data presented
using three different techniques. The last section described how the formatted message view of a
variable using the
SNVT_switch
type is defined. The animated LED is a more visually appealing
mechanism to present this data (see figure 9). In this case, a tag that looks as the state portion of
the variable is defined.
1. 
From the WindowMaker tool, double-click the LED to the right of SW- 1. This object is an InTouch
Light Wizard. Wizards are higher level objects that support only a predefined set of animation links.
As seen in the figure 10, this object supports a discrete expression that is driven by the value of the
tag SW_1State.

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12
InTouch Example Description
Figure 9
Example HMI application main window runtime view.
2. 
Double-click the tag name in the 
Expression
field to see the definition of this tag. As shown in
figure 11, the item definition has an additional component beyond the network variable name that is
the ‘state’ field of the SNVT_switch typed variable.
Figure 10
Light wizard description dialog.

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InTouch Example Description
13
Figure 11
I/O Descrete tag definition for the state field of a SNVT_switch network variable.
Changing the Default Format
The
LonPoint Index Type
frame in the HMI example application uses two tags to present
the value of the Mode Simulator both in the default form and as an integer value. In its default form,
the mode is reported as a string spelling out the enumerated value. As such, the InTouch tag would
be declared as and I/O Message type, and the item description of the I/O tag is declared as follows:
DI-1.Mode Simulator.Mode_Out
In the second case, the InTouch tag is declared to be an I/O Integer, and the item description of the
tag includes and additional flag to modify the type used to present the data as follows:
DI-1.Mode Simulator.Mode_Out -tInteger
The integer value representation is more appropriate if the HMI application needs to use the mode
to control the execution of a script.