Allen-Bradley Micro800 General Instructions Manual page 36

Programmable controllers

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Table of Contents

Ladder Diagram (LD) elements

To enable EN/ENO for all blocks added to LD program

1. On the Tool menu, click Options.

2. Select IEC Languages > Ladder Diagram (LD) to display the language

editor properties.

3. In Block Settings, set Enable EN/ENO to True.

4. Click OK.

To enable EN/ENO for the block

1. After selecting a block in the Block Selector, select EN/ENO (located at the

bottom of the list).

2. In the Block Selector, after selecting at the bottom of the list of instructions,

select EN/ENO.

Example: Instruction Block (LD)

Use of enable inputs and enable outputs in LD instruction blocks

The rung state in an LD diagram is always boolean, and a block's first input and

first output is connected to the rung.

Rockwell Automation Publication 2080-RM001D-EN-E - February 2015