Rockwell Automation 2711 PANELBUILDER SOFTWARE USER MANUAL - Manual (Page 274)

The Objects
Chapter 10
10-9
There are three different Control Selectors:
Control List Selector with Enter
Control List Selector without Enter
Set Bit Cursor Point (for Keypad terminals only)
These three objects allow an operator to select from a list of choices. The
current operator choice is always indicated by the the value at the selector
control address, a PLC input address.
The minimum size of a selector is 1 character.
Selectors can also be positioned so they point at other objects on the same
screen. For example, a list selector could point to an adjacent list of
numeric display objects. Values entered via the numeric keypad could be
directed (by the PLC program) to the PLC storage address of the numeric
value being displayed.
The Set Bit Cursor Point object is only available with Keypad terminals.
Set Bit Cursor Points can be positioned on the screen in a row, column, or
row and column array. The operator then uses special keys (arrow keys,
Home, Select and Cancel) to make choices.
Control List Selector Addressing
Consider each entry in the Control List Selector as a state, where state 0 is
the first entry, state ‘n’ is the last entry. Each state in the list corresponds to
a selector control address, (a PLC input address). The number of bits
required depends upon the number of states in the Selector and the data
type used. For example, if you have a List Selector with ten states, you will
need the following number of bits for the three data types listed below
Binary: 4 bits
BCD: 4 bits (Top Position value = 0)
8 bits (Top Position value = 1)
Bit: 9 bits (Top Position = All Bits OFF)
10 bits (Top Position = First Bit ON)
Control Selectors