Rockwell Automation 1794-Lxxxx PhaseManager User Manual
Page 65
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.