Rockwell Automation 2711-ND3 PanelBuilder v2.60 Software User Manual - Manual (Page 48)

3–6 Planning an Application
Publication 2711-6.0
Each dynamic screen object must be linked to a controller data table.
(This is not always true for DeviceNet. See publication DeviceNet
Communications for PanelView Terminals). The PanelView
terminal
either reads data for indicators such as bar graphs or writes data for
controls like push buttons.
Values in the logic controller data table are updated on a regular
basis. This process is called scanning. In each scan:
•
the logic controller and the terminal write data to specific
addresses updating values
•
the logic controller reads the entire data table and updates values
at other addresses according to the PanelBuilder application
PanelView 900 Application
PLC/SLC Data Tables
Level
Full
3/4
1/2
Empty
Input Table
Output Table
Integer Table
Counters, Timers,
Status, Controls
PanelBuilder uses read and write tags to link objects with specific
controller addresses. Each tag has a unique name and specifies
attributes such as the location and size of an address, the type of data
to read from or write to the address and scaling parameters.
Linking Screen Objects
to Controller Data