Rockwell Automation 1794-Lxxxx PhaseManager - Manual (Page 102)

102 Publication LOGIX-UM001B-EN-P - April 2010
Appendix A Equipment Phase Instructions (PSC, PCMD, POVR, PFL, PCLF, PXRQ, PRNP, PPD, PATT, PDET)
Detach from Equipment
Phase (PDET) Use the PDET instruction to relinquish ownership of an equipment phase.
Operands:
Relay Ladder
Structured Text
The operands are the same as those for the relay ladder PDET instruction.
Description: After a program executes a PDET instruction, the program no longer owns the
equipment phase. This frees the equipment phase for ownership by another
program or by FactoryTalk Batch software. Use the PDET instruction only if
the program previously took ownership of an equipment phase via an Attach
to Equipment Phase (PATT). instruction.
Arithmetic Status Flags: not affected
Fault Conditions: none
Execution:
Operand Type Format Description
Phase Name phase name of the
equipment
phase Equipment phase that you no longer want to
own
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.
• The rung-condition-out is set to true. 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 The instruction relinquishes ownership of the
specified equipment phase. The instruction relinquishes ownership of the
specified equipment phase.
postscan The rung-condition-out is set to false. No action taken.