Instruction Block (Ld) - Allen-Bradley Micro800 General Instructions Manual

Instruction Block (LD)

A LD instruction block element is a functional element in a LD diagram that can
be a function block, a function, a user-defined function block, or an operator.
LD instruction blocks
The Connected Components Workbench instruction set includes IEC 61131-3
compliant instruction blocks. Instruction blocks collectively include operators,
functions and function blocks.
Add an Instruction Block to an LD program
Use the LD Toolbox to add an Instruction Block element to an LD program.
After you add the instruction block, you can configure its variables from the
Instruction Block Selector or from the Variable Selector.
Follow these steps to add an Instruction Block element to an LD program, or
change an existing instruction block to a different type.
Add a instruction block element to a program
1. From the Toolbox, drag the instruction block element into the language
editor and place it in the correct location to display the Instruction
Block Selector.
2. In Search type the name of the block you want to add or sort and scroll
through the list to find it.
3. Double-click the instruction block to add it to the program.
Change the instruction block element type
1. In the language editor, double-click the instruction block to display the
Instruction Block Selector.
2. In Search type the name of the block or sort and scroll through the list to
find it.
3. Double-click the instruction block to update it.
Enable EN/ENO
You can enable the EN input parameter and ENO output parameter so they will
always be added with the instruction block even when there is an available boolean
input or output.
Note: The EN and ENO parameters will only be added to instruction blocks you
add after you enable the setting - instructions blocks already in the LD program
will not be affected.
Rockwell Automation Publication 2080-RM001D-EN-E - February 2015
Ladder Diagram (LD) elements
Chapter 3
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