Clear (CLR)

The CLR instruction clears all the bits of the Dest.
Available Languages
Ladder Diagram
Ladder Diagram_Clear (CLR)_v1
FactoryTalk Design Studio
 DSL - Ladder Diagram
Operands
IMPORTANT: Unexpected operation may occur if:
  • Output tag operands are overwritten
  • Members of a structure operand are overwritten
  • Except when specified, structure operands are shared by multiple instructions.
The CLR instruction supports elementary data types. See Elementary data types.
Ladder Diagram
Operand
Data Type
Format
Description
Dest
SINT
INT
DINT
REAL
tag
Tag to clear.
Affects Math Status Flags
Conditional. See Math status flags.
Major/Minor Faults
None specific to this instruction. See Index through arrays for array-indexing faults.
Execution
Ladder Diagram
Condition/State
Action Taken
Prescan
N/A
Rung-condition-in is false
Set Rung-condition-out to Rung-condition-in.
Rung-condition-in is true
Set Rung-condition-out to Rung-condition-in.
Clear Dest to 0.
Postscan
N/A
Example
Ladder Diagram
FTStudio-CLR-LD-EX-V1
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