Manual

Publication LOGIX-UM001B-EN-P - April 2010 95
Equipment Phase Instructions (PSC, PCMD, POVR, PFL, PCLF, PXRQ, PRNP, PPD, PATT, PDET) Appendix A
Execution:
Condition Relay Ladder Action Structured Text Action
Prescan The rung-condition-out is set to false. No action taken.
Rung-condition-in is false The rung-condition-out is set to false. N/A
Rung-condition-in is true The instruction executes. N/A
Scan of structured text N/A In structured text, instructions execute each time
they are scanned. To limit the scan of an instruction,
use a qualifier of an SFC action and/or a structured
text construct.
Instruction execution Substate Action Substate Action
pausing • The substate = paused.
• The Paused bit of the PHASE tag
=1.
• The rung-condition-out = false.
pausing • The substate = paused.
• The Paused bit of the PHASE tag
=1.
not pausing The rung-condition-out = true. not pausing No action taken.
Postscan The rung-condition-out is set to false. No action taken.