Rockwell Automation Logix5000 Logix5000 Controllers Quick Start - Manual (Page 23)

Publication 1756-QS001E-EN-P - October 2009 23
Program and Test a Simple Project Chapter 1
Enter a Function Block Diagram
Enter function block diagram instructions in a function block routine.
1. Click the tab for the desired instructions.
2. Drag elements from the toolbar to the sheet.
3. To connect elements, click corresponding pins (green dot = valid connection point).
EXAMPLE
In the following example, an Input Reference (IREF) reads the value of an analog input and sends the value
to a Scale (SCL) instruction. The SCL instruction converts the value to engineering uses and sends it to an
Output Reference (OREF). The OREF writes the value to an analog output.