Rockwell Automation 2711E PanelBuilder 1400e Modbus Communications - Manual (Page 46)

6–9 Defining Tags
Publication 2711E-6.12 – August 1997
4. Fill in the fields as outlined below:
Security
This field is reserved for RSView databases. You cannot enter
anything in the Security field.
Description
Type a description of this tag up to 128 characters long.
Off Label and On Label
These fields are reserved for RSView databases. You cannot enter
anything in them.
Initial Value
Enter an initial value of 0 or 1 for the digital tag. When a tag is
used with a PanelBuilder input object or function, this initial
value is written to the controller when the application first
executes.
For a PanelBuilder object with an initial state and a main control
tag, the object’s initial state value supersedes the tag’s initial
value, so that the initial state value is written to the controller
instead of the tag’s initial value. On application upload, the
object’s initial state value is used as the tag’s initial value.
Note: For the PanelView terminal to write default values to the
controller, you must choose No for “Use Default Operation,” on
the terminal’s Application Startup screen, and you must cycle
power to the terminal. Default values are written to the controller
whenever you subsequently cycle power to the terminal.
5. To fill in the fields for data source, see
Specifying a Data
Source” later in this chapter.
Addressing Syntax
For digital tags, the addressing syntax is as follows:
Addressing Syntax for Devices Using 5-digit Addressing:
Reference Operations Addressing Syntax
0 bit
read and write 0bbbb where
bbbb = bit 0001 to 9999 (decimal)
1 bit
read only 1bbbb where
bbbb = bit 0001 to 9999 (decimal)
3 word
read only 3wwww/bb where
wwww = word offset 0001 to 9999 (decimal)
/bb = bit offset in word 01 to 16 (decimal)
4 word
read only 4wwww/bb where
wwww = word offset 0001 to 9999 (decimal)
/bb = bit offset in word 01 to 16 (decimal)
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