Rockwell Automation FactoryTalk View Machine Edition Users Guide - Manual (Page 515)

25 • Use parameters and global objects
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3. Use descriptive text to illustrate the objects in the display.
4. In the Main Menu display, create a display list selector for opening the Canning
display, with two states.
5. In the first state, choose the parameter list option and select the Corn parameter tags
from the Tag Browser in this order: Corn_Name, Corn_Temp, Corn_Weight,
Corn_Level. In the second state, do the same for the Peas tags.
6. Call the captions for the states Corn and Peas, respectively.
At run time, when the operator selects the Peas state on the display list selector in the
Main Menu, and presses the Enter key, the Canning Overview display opens and shows
the values of the Pea_ tags. When the operator selects the Corn state, the values of the
Corn_ tags are displayed.
Parameter passing
You can use parameter files or parameter lists to pass (carry forward) parameters from one
display to other related displays that open from it. To carry the same parameter forward to
subsequent displays, assign the same tag placeholder (for example, #1), instead of a tag
name in the parameter list or parameter file field of the object in the related display.
Example: Use a parameter list to replace tag placeholders in linked
displays
This example uses PIDE faceplate displays to demonstrate parameter passing.
The main, or first level display, is called MAIN. It has a Goto display button that opens a
Logix_PIDE faceplate display. The faceplate has a Goto display button that opens a Trend
faceplate.
In the Main display, the Goto display button has the parameter list option on the General
tab selected, and a structure tag name, with a shortcut, selected from the Tag Browser to
represent #1: {::[PLC1] Program:Fermenter_Temp.Tank_PIDE01}, for example.
When the button is pressed, the Logix_PIDE faceplate opens. The objects on the faceplate
have been set up to read the tags in the structure: #1.CV, #1.SP, and so on. The objects
Bar graph #4
This graphic object Uses this tag placeholder