Allen-Bradley LOGIX 5000 User Manual

Equipment Sequence
Chapter 8
Rockwell Automation Publication 1756-RM006K-EN-P - November 2018 471
Major/Minor Faults
The SASI instruction cannot trigger a fault, so there are no fault conditions for
this instruction.
Execution
Ladder Diagram
Condition Action Taken
Prescan The rung-condition-out is set to false.
Rung-condition-in is false The rung-condition-out is set to false.
Rung-condition-in is true
•
The instruction executes.
• The rung-condition-out is set to true.
Scan of structured text No action taken
Instruction execution The instruction tries to take ownership of the specified Equipment
Sequence.
Postscan The rung-condition-out is set to false.
Structured Text
Condition Action Taken
Prescan No action taken.
Rung-condition-in is false No action taken.
Rung-condition-in is true No action taken.
Scan of structured text 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.
Instruction execution The instruction tries to take ownership of the specified Equipment
Sequence.
Postscan No action taken.
See also
SASI instruction examples on page 485
Equipment Sequence Instructions on page 465
Use the Equipment Sequence Clear Failure (SCLF) instruction to clear the failure
code of an Equipment Sequence. Keep the following in mind when using the
SCLF instruction.
• A CLR instruction, MOV instruction, or assignment does not change the
failure code of an Equipment Sequence.
Equipment Sequence Clear
Failure (SCLF)

Allen-Bradley LOGIX 5000 Specifications

General

Brand	Allen-Bradley
Model	LOGIX 5000
Category	Controller
Language	English