Rockwell-automation 2711 PANELBUILDER SOFTWARE USER MANUAL Manual de usuario descargar pdf (Pagina 101)

100

101

Planning Your Application

Chapter 4

4-26

To save application memory, consider the following options:

when creating spaces between words in object text, use the space bar

instead of the right arrow key. The space character will appear as an

underscore in PanelBuilder, but will be a space on the PanelView

terminal screen. When the right arrow is used, each word becomes a

separate text element requiring 8 bytes of memory, whereas the space

character requires one byte

when using the Multi-State Indicator, delete all states not being

used—four states is the default

when drawing rectangles, use the Box object instead of drawing each

side with a Line object. Each line requires 9 bytes, whereas one Box

object requires 9 bytes

if a Multi-State indicator will have the same text for all states, use outer

text and a solid indicator instead of state text. Outer text requires eight

bytes for each text string plus one byte per character; state text would

require the same amount of memory for each state

in general, limit the use of text when assigning screen names, messages

and object text

The sample application consists of three screens: a main screen, a screen to

control five conveyor belts, and a screen to control five pumps and monitor

the pressure in five associated vessels. The application:

turns five conveyor belts on and off

selects one of five pumps and turns it on or off. The pumps maintain the

pressure (PSI) in associated vessels. The operator can monitor the

pressure of each vessel

The Sample Application is designed for:

a color keypad terminal

a PLC 5/15

a quarter rack space

Reducing Memory

Requirements

Sample Application Planned

with Worksheets

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