Rockwell Automation Publication 1769-UM021G-EN-P - October 2015
271
Develop Applications
Chapter 10
Tags
With a Logix5000 controller, you use a tag (alphanumeric name) to address data
(variables). In Logix5000 controllers, there is no fixed, numeric format. For
example, as shown in the following figure, you can use the tag name
north_tank_mix
instead of a numeric format, such as N7:0.0.
The tag name itself identifies the data. The tag lets you do the following:
•
Organize your data to mirror your machinery.
•
Document your application as you develop it.
This example shows data tags that are created in the scope of the Main Program
of the controller.
Figure 49 - Tags Example
Digital I/O Device
Analog I/O Device
Integer Value
Storage Bit
Counter
Timer
Controller Organizer - Main Program Parameters and Local Tags
Program Tags Window - Main Program Tags
