Allen-Bradley LOGIX 5000 Reference Manual page 478

Chapter 8 Equipment Sequence
Condition
Prescan
Rung-condition-in is false
Rung-condition-in is true
Scan of structured text
Instruction execution
Postscan
Condition
Prescan
Rung-condition-in is false
Rung-condition-in is true
Scan of structured text
Instruction execution
Postscan
478
Execution
Ladder Diagram
Structured Text
See also
Guidelines for SOVR instructions
Result codes for SOVR instructions
SOVR instruction examples
When should I use an SOVR instruction instead of an SCMD instruction?
on page 489
Rockwell Automation Publication 1756-RM006K-EN-P - November 2018
Action Taken
The rung-condition-out is set to false.
The rung-condition-out is set to false.
The instruction executes.
The rung-condition-out is set to true.
No action taken
The instruction commands the Equipment Sequence to the specified state.
The rung-condition-out is set to false.
Action Taken
No action taken.
No action taken.
No action taken.
In structured text, instructions execute each time they are scanned. To
limit the scan of an instruction, use a qualifier of an SFC action or a
structured text construct that includes a condition, such as if, then, or else.
The instruction commands the Equipment Sequence to the specified state.
The SOVR instruction sends one of the following commands: HOLD, STOP,
or ABORT.
No action taken.
on page 480
on page 484
on page 488