Rockwell Automation 5720 DriveLogix System - Manual (Page 100)

Publication 20D-UM002C-EN-P - November 2003
4-16 Placing and Configuring Local I/O
Using aliases to simplify tag names
An alias lets you create a tag that represents another tag. This is useful for
defining descriptive tag names for I/O values. For example:
Monitoring I/O Modules The DriveLogix controller offers different levels at which you can monitor
I/O modules. You can:
• configure an I/O module so that the controller faults if that I/O
module loses its connection with the controller
• use the programming software to display fault data
• program logic to monitor fault data so you can take appropriate action
Configuring the module’s response to a connection failure
You can configure modules to generate a major fault in the controller if they
lose their connection with the controller.
If you do not configure the major fault to occur, you should monitor the
module status. If a module loses its connection to the controller:
• outputs go to their configured faulted state
Example: Description:
I/O structure Local:0:O.Data.0
Local:0:I.Fault.0
The aliases describe the specific I/O points.
alias light_on = Local:0:O.Data.0
light_off = Local:0:I.Fault.0