Rockwell Automation 1772-LV Mini-PLC - 2/15 Programmable Controller (Series B) Programming and Operations - Manual (Page 42)

Fundamental Instruction Set
Chapter 5
5Ć5
Exami ne On
Symbol: -| |-
Purpose: This instruction tells the controller to examine a bit at a specified
memory location.
Syntax: Programmed at the condition side of the rung.
Function: Determines the instruction condition. The instruction condition
becomes:
True
If the controller detects that a bit in memory is set.
False
If the controller detects that a bit in memory is reset.
Examine Off
Symbol: -|/|-
Purpose: This instruction tells the controller to examine a bit at a specified
memory location.
Syntax: Programmed at the condition side of the rung.
Function: Determines the instruction condition. The instruction condition
becomes:
True
If the controller detects that a bit in memory is reset.
False
If the controller detects that a bit in memory is set.
Energize
Symbol: -( )-
Purpose: This instruction tells the controller to set or reset a specified memory
bit.
Syntax: Programmed at the output side of the rung.
Function: Controls a specific bit based on the rung condition. when the
preceding rung conditions are:
True
The energize instruction set a specified bit.
False
The energize instruction resets a specified bit.
Bit Examining Instructions
Bit Controlling Instructions