Rockwell Automation 2706-MB1 MESSAGEVIEW 421 SOFTWARE MANUAL - Manual (Page 182)

8–5 Working with Tags
Publication 2706-817
69
Table View Form View
Field Description Valid Characters Notes
Tag Name
①
The name of the
tag
Maximum characters = 32.
•
A to Z, a to z, 0 to 9
•
hyphen (–), underscore(_),
percent (%).
If an invalid character is entered, the Tag Editor beeps and does
not display it.
•
Do not use blanks, tabs, carriage returns or non-printable
characters.
•
Tag names cannot begin with 0 – 9, hyphen, or percent.
•
Tag names are not case-sensitive: LIST, List, and list are all
the same to the Tag Editor.
•
Tag names must be unique in a project.
Data Type
①
The data format
for the tag
Select one of the following:
•
bit
•
4BCD
•
unsigned integer
•
signed integer
•
character array
Use either of these methods:
•
Type the letter of the data type, for
example, b for bit.
•
Use TAB to move to the Data Type
field, press ALT +
↓
to display the
list of data types.
The tag Data Type determines the data format for the variable.
Array Size
(Character Array
type only) The number of
characters in the
array
Range of characters = 2 to 33;
•
A to Z, 1 to 9.
•
Do not use blanks, tabs, carriage returns or non-printable
characters.
•
Array size must be an integer.
Defining Tags