Rockwell Automation Logix5000 Controllers Function Block Diagram Programming Manual - Manual (Page 17)

Program a Function Block Diagram Chapter 1
Like wires, connectors transfer data from output pins to input pins. Use
connectors when:
• The elements that you want to connect are on different sheets within the
same routine.
• A wire is difficult to route around other wires or elements.
• You want to disperse data to several points in the routine.
To use connectors, use these rules.
• Each OCON requires a unique name.
• For each OCON, you must have at least one corresponding ICON, such as
an ICON with the same name as the OCON.
• Multiple ICONs can reference the same OCON. This lets you disperse data
to several points in your routine.
These instructions support the concept of Program/Operator control.
• Enhanced Select (ESEL)
• Totalizer (TOT)
• Enhanced PID (PIDE)
• Ramp/Soak (RMPS)
• Discrete 2-State Device (D2SD)
• Discrete 3-State Device (D3SD)
Program/Operator control lets you control these instructions simultaneously
from the user program and from an operator interface device. When in Program
control, the instruction is controlled by the Program inputs to the instruction.
When in Operator control, the instruction is controlled by the Operator inputs to
the instruction.
Identify any connectors
Define program/operator
control
Rockwell Automation Publication 1756-PM009E-EN-P - October 2014 17