Manual

Publication LOGIX-UM001B-EN-P - April 2010 65
Equipment Phase Instructions (PSC, PCMD, POVR, PFL, PCLF, PXRQ, PRNP, PPD, PATT, PDET) Appendix A
Arithmetic Status Flags: not affected
Fault Conditions: none
Execution:
24578 The command is not valid for the current state of the equipment phase.
For example, if the equipment phase is in the running state, then a start
command is not valid.
24579 You cannot command the equipment phase. One of the following
already owns the equipment phase.
• RSLogix 5000 software
• external sequencer (FactoryTalk Batch software)
• another program in the controller
24594 The equipment phase is unscheduled, inhibited, or in a task that is
inhibited.
Code (Dec) Description
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 commands the equipment phase to
the specified state.
The instruction commands the equipment phase to
the specified state.
postscan The rung-condition-out is set to false. No action taken.