Allen-Bradley LOGIX 5000 Reference Manual page 409

Logical and Move
Description
The Reset Dominant instruction uses the Set and Reset input parameters to
control latched output parameters Out and OutNot. The Reset input has
precedence over the Set input.
Out will be latched true whenever the Set input parameter is set true. Setting the
Reset parameter to true will override the current state of Out, setting Out to false.
When Reset returns to false, Out will be latched to the current state of the Set
input parameter. 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 fault related
attributes.
Execution
Function Block
Condition/State
Prescan
Tag.EnableIn is false
Tag.EnableIn is true
Instruction first run
Instruction first scan
Postscan
Structured Text
Condition/State
Prescan
Normal Execution
Postscan
Example
When Set is true and Reset is false, Out is set true. When Reset is true, Out is
cleared. The Reset input has precedence over the Set input. The RESD instruction
sets OutNot to the opposite state of Out.
Rockwell Automation Publication 1756-RM006K-EN-P - November 2018
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 False.
N/A
EnableIn and EnableOut bits are cleared to false.
Action Taken
See Prescan in the Function Block table.
See Tag.EnableIn is true in the Function Block table.
See Postscan in the Function Block table.
Chapter 6
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