Allen-Bradley LOGIX 5000 User Manual

Equipment Sequence
Chapter 8
Rockwell Automation Publication 1756-RM006K-EN-P - November 2018 467
Execution
The following table describes the execution steps for SATT instructions.
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
Guidelines for SATT instructions on page 479
Result codes for SATT instructions on page 481
SATT instruction examples on page 486
Equipment Sequence Instructions on page 465

Allen-Bradley LOGIX 5000 Specifications

General

Brand	Allen-Bradley
Model	LOGIX 5000
Category	Controller
Language	English