Rockwell-automation 1772-LV Mini-PLC - 2/15 Programmable Controller (S Manual de usuario descargar pdf (Pagina 42)

Fundamental Instruction Set

Chapter 5

55

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

1 2 ... 37 38 39 40 41 42 43 44 45 46 47 ... 214 215

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Rockwell-automation 1772-LV Mini-PLC - 2/15 Programmable Controller (S Manual de usuario Pagina 42