Allen-Bradley LOGIX 5000 Reference Manual page 423

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.
Condition/State Action Taken
Prescan No action taken.
Postscan No action taken.
EnableIn is false No action taken.
EnableIn is true The instruction executes.
Example
Ladder Diagram
If Step.6 = 1 (step 6 in the sequence) then
Each PDET instruction relinquishes ownership of the phases that the
sequence owned.
Each Ownership bit = 0. (In the Ownership tag, each equipment phase is
assigned a bit.)
Done = 1. (This signals the sequence to go to the next step.)
Rockwell Automation Publication 1756-RM006K-EN-P - November 2018
Chapter 7
423