Rockwell-automation FactoryTalk View Machine Edition Users Guide Instrukcja Użytkownika Pobierz pdf (Strona 104)

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FACTORYTALK VIEW MACHINE EDITION USER’S GUIDE

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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 (-)

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