Rockwell Automation Logix 5000 - Assign an immediate value (constant); Use an IREF; Enter a value in the tag of a block; Connect blocks with an OCON and ICON

Chapter 1 Program a Function Block Diagram
28 Rockwell Automation Publication 1756-PM009J-EN-P - March 2022
Y
ou can assign a constant value instead of a tag value to an input parameter.
If you want to:
Then:
Make the value visible on the diagram and in reports
Use an IREF on page 28
Change the value online without editing the routine
Enter a Value in the Tag of a Block on page
28
Complete these steps to assign a value to an IREF.
1. Add the IREF to the routine. For instructions on adding an element,
see Add a function block element on page 21
.
2. Wire the IREF to the input pin that gets the value. For instructions on
wiring elements together, see Wire elements together on page 25.
3. Double-click the operand area of the IREF.
4. In the box, type the value and press Enter.
Complete these steps to assign a value to a parameter when no wire
connec
ts to its pin.
1. In the block, click Properties .
2. On the Parameters tab, in the Value box of the desired parameter, type
the value.
3. Click OK.
Use an output wire connector (OCON) or input wire connector (ICON) to
transfer data between sheets or in complex wiring situations.
Assign an immediate value
(constant)
Use an IREF
Enter a value in the tag of a
block
Connect blocks with an
OCON and ICON