Rockwell Automation Logix5000 Logix5000 Controllers Quick Start - Manual (Page 25)

Publication 1756-QS001E-EN-P - October 2009 25
Program and Test a Simple Project Chapter 1
For example, in the SCL instruction, specify the following parameters:
• InRawMax – maximum input value
• InRawMin – minimum input value
• InEUMax – maximum engineering value
• InEUMin – minimum engineering value
3. Click OK.
Assign Alias Tags for Your Devices
While you can use the input and output tags of a module directly in your logic, it is easier to use alias tags. An
alias tag is a tag that represents another tag.
• Both tags share the same data.
• When the data changes, both tags change.
• An alias tag provides a descriptive name for data, such as DeviceNet input or output data.
• If the location of the data changes, simply point the alias tag goes to the new location without editing
your logic.
As an option, create tags that describe each device without pointing them to the actual addresses of the
devices. Later, convert the tags to aliases for the data of the devices.
1. Enter the logic.
2. Type a descriptive tag name for the device.
3. Right-click the tag name and choose New…