Rockwell Automation 2711-ND3 PanelBuilder v2.60 Software User Manual - Manual (Page 56)

3–14 Planning an Application
Publication 2711-6.0
The memory available for applications varies for the PanelView
terminals.
Screen Tips on Reducing Memory
Review the following list for hints on ways to reduce the size of an
application.
•
For DH-485, DH+ or DF1 applications, group tag addresses for
each screen in the same 40 word block.
•
For multistate or list objects, create the exact number of states or
entries required by the application.
•
Don’t use multistate indicators, list indicators, or message
displays if a numeric data display can provide the same function.
Likewise, don’t use a control list selector if a numeric entry
object is sufficient.
•
If a multistate indicator uses the same text for all states, use a
solid indicator with outer text instead of inner text for each state.
•
Reuse text that exists in the application rather than creating the
same string multiple times. See Chapter 18 for details on how to
copy existing text into objects or object states.
•
Limit the amount of text in screen names, messages and objects.
•
When drawing rectangles, use a shape instead of individual lines.
Each line requires the same amount of memory as a single shape.
•
Freeform drawings are memory intensive.
•
Rectangular objects or graphics of the same size use less memory
because the terminal uses the same data to display the objects. If
2 push buttons are the exact same size, the terminal (keypad or
touch) uses the same data to display the rectangle of both buttons.
•
Use a global object if the application requires the same object on
several screens. A global object can be accessed from any screen.
The PanelView stores only 1 copy of the object. See Chapter 14.
•
Limit the use of bitmap graphics.
•
Use multiple embedded variables within a single text string rather
than using multiple numeric data displays.
•
Maximum number of screens is 255.
•
Maximum number of tags and objects is unlimited but must not
exceed runtime memory.
•
Maximum number of bitmaps and text is unlimited but must not
exceed application memory.
Memory
Requirements/Tips