Rockwell Automation FactoryTalk View Machine Edition Users Guide - Manual (Page 104)

F ACTORY T ALK V IEW M ACHINE E DITION U SER ’ S G UIDE
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This example shows you how to specify the OPC topic, item name, and bit level of an
item that uses the integer data type in a Logix5000 processor.
OPC topic and item addressing
Logix5000 uses this addressing syntax:
[Device shortcut]item name for RSLinx Enterprise.
[OPC topic name]item name for RSLinx Classic.
In this example, the RSLinx Enterprise device shortcut name for the Logix5000 processor
is CLGX. To connect to an OPC item called Motor, type this address:
[CLGX]Motor
Bit level addressing
You can gain access to the bit level of an item that uses the integer data type by appending
.# to the end of the tag address, where # is the number of the bit you want access to.
For example, to gain access to the first bit of the integer item Motor, type this address:
[CLGX]Motor.0
Organize HMI tags
Organize tags makes finding and using tags faster and simpler. To organize your tags, try
these tips:
 Establish naming conventions.
Naming conventions enable you to use wildcard characters most effectively when
searching for and showing tags during development.
 Use folders to group related tags.
Name tags
Tag names can be up to 255 characters long including folder name. If you create a folder,
the folder name becomes part of the tag name. The backslash (\) after a folder name
counts as a character.
The tag name can contain these characters:
 A to Z
 0 to 9
 underscore (_) and dash (-)