Allen-Bradley LOGIX 5000 Reference Manual page 419

Equipment Phase Instructions
Execution
For Structured Text, EnableIn is always true during normal scan. Therefore, if the
instruction is in the control path activated by the logic, it will execute. All
Conditions below the thick solid line can only occur during Normal Scan mode.
Condition/State
Prescan
Postscan
EnableIn is false
EnableIn is true
Example
Ladder Diagram
If Step.1 = 1 (first step in the sequence) then
Each PATT instruction tries to take ownership of an equipment phase.
If the Result of a PATT instruction = 0 or 24582 (the program owns
the equipment phase), then
A bit within the Ownership tag = 1. (In the Ownership tag, each
equipment phase is assigned a bit.)
If Ownership = 3 (The program owns both equipment phases as shown by
bits 0 and 1), then
Rockwell Automation Publication 1756-RM006K-EN-P - November 2018
Action Taken
No action taken.
No action taken.
No action taken.
The instruction executes as described above.
Chapter 7
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