Allen-Bradley LOGIX 5000 Reference Manual page 412

Chapter 6 Logical and Move
412
DOMINANT_SET Structure
Input Data Type
Parameter
EnableIn BOOL
Set BOOL
Clear BOOL
Output Data Type
Parameter
EnableOut BOOL
Out BOOL
OutNot BOOL
Description
The Set Dominant instruction uses the Set and Reset input parameters to control
latched output parameters Out and OutNot. The Set input has precedence over
the Reset input.
Out will be latched true whenever the Set input parameter is set true. Setting the
Reset parameter to true will set Out to false only if the Set input is false. OutNot
will be set to the opposite state of Out.
Affects Math Status Flags
No
Major/Minor Faults
None specific to this instruction. See Common Attributes for operand-related
faults.
Execution
Condition/State
Prescan
Tag.EnableIn is false
Tag.EnableIn is true
Instruction first run
Instruction first scan
Postscan
Rockwell Automation Publication 1756-RM006K-EN-P - November 2018
Description
Enable input. If cleared, the instruction does not execute
and outputs are not updated.
Default is set.
Set input to the instruction.
Default is cleared.
Reset input to the instruction.
Default is cleared.
Description
Indicates if instruction is enabled.
The output of the instruction.
The inverted output of the instruction.
Action Taken
EnableIn and EnableOut bits are cleared to false.
EnableIn and EnableOut bits are cleared to false.
EnableIn and EnableOut bits are set to true.
The instruction executes.
Previous Out is set to True.
N/A
EnableIn and EnableOut bits are cleared to false