Manual

Publication LOGIX-UM001B-EN-P - April 2010 103
Equipment Phase Instructions (PSC, PCMD, POVR, PFL, PCLF, PXRQ, PRNP, PPD, PATT, PDET) Appendix A
Example:
Relay Ladder
Structured Text
If Step.6 = 1 (step 6 in the sequence) then
Each PDET instruction relinquishes ownership of the equipment 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.)
When the sequence is done, this action:
• relinquishes ownership of the equipment phases
• clears the ownership flags (bits that the SFC set when it took
ownership of the equipment phases)
The P1 qualifier limits this to the first scan of the step.