Rockwell Automation 1794-Lxxxx PhaseManager - Manual (Page 92)

92 Publication LOGIX-UM001B-EN-P - April 2010
Appendix A Equipment Phase Instructions (PSC, PCMD, POVR, PFL, PCLF, PXRQ, PRNP, PPD, PATT, PDET)
Equipment Phase Paused
(PPD) Use the PPD instruction to set up breakpoints within the logic of an
equipment phase.
Operands:
Relay Ladder
none
Structured Text
none
You must enter the parentheses ( ) after the instruction mnemonic, even
though there are no operands.
Description: The PPD instruction lets you stop execution at a specific step (breakpoint) to
test and troubleshoot your logic. When an equipment phase is in the pausing
substate and the controller executes a PPD instruction, the controller:
• sets the Paused bit of the PHASE tag = 1.
• makes the rest of the rung = false (RLL).
Once you place PPD instructions in your equipment phase, you can either use
them or ignore them.
The auto pause, pause, and resume commands let you change the substate and step through your
breakpoints.
The auto pause and pausing substates let you control whether or not the
equipment phase uses your breakpoints.