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Chapter 3

Tag Configuration

3-12

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Connection

You associate a tag with its real-world I/O point by assigning it a Server, 
I/O Group, and Item in the Connection tab of the Tag Configuration 
dialog box, shown in Figure 3-5. If an I/O Group does not already exist for 
the server, you must create one before you can select or enter an item for 
the tag. The I/O Group is user-defined and provides you with a place to 
configure the rate and deadband for an item. For IAK and VI-based servers, 
you select the device as part of the I/O group configuration. For OPC 
servers, the I/O group conforms to an OPC group.

When you edit a tag, use the ring inputs to assign values to the tag. Use the 
Create…, Edit…, and Delete buttons to configure I/O Groups and Items. 
For more information about device servers, see Chapter 8, 

.

Table 3-1.  General Configuration Attributes

 Tag Name

all

Determines the name of the tag you are configuring. Always refer 
to a tag by its name. Tag names are not case sensitive and can 
include any combination of printable characters (including 
space) with the exception of “/” (forward slash) and “\” 
(backslash).

Tag Group

all

Determines the group name to use for this tag. You can use 
groups to assist in alarm management and reporting and to help 
organize tags in an application.

Tag 
Description

all

Provides a description of the tag.

Maximum 
Length

string, 
bit array

Determines the maximum number of bits in the bit array. 
The length is between 1 and 32 for bit array tags. String tags 
can be of any length.