Allen-Bradley LOGIX 5000 Reference Manual page 430

Chapter 7 Equipment Phase Instructions
430
PCMD Result Codes
If assigning a tag to store the result of a PCMD instruction, the instruction returns
one of these codes when it executes:
Code (Dec) Description
0 Successful command.
24577 Valid command.
24578 Invalid command 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 Cannot command the equipment phase. One of these already owns the equipment phase.
• Logix Designer
• HMI
• external sequencer (for example, FactoryTalk Batch software)
• another program in the controller
24594 Unscheduled or inhibited equipment phase or in an inhibited task.
Tip: High priority HMI ownership is specific only to CompactLogix 5370 and
ControlLogix 5570 controllers.
Affects Math Status Flags
No
Major/Minor Faults
None. See Index Through Arrays for operand-related faults.
Execution
For Structured Text, EnableIn is always true during normal scan. Therefore, if the
instruction is in the control path activated by the logic, it will execute. All
conditions below the think solid line can only occur during Normal Scan mode.
Condition/State Action Taken
Prescan No action taken.
Postscan No action taken.
EnableIn is false No action taken.
EnableIn is true The instruction executes as described above.
Rockwell Automation Publication 1756-RM006K-EN-P - November 2018
Anticipate ownership conflicts or other
possible errors
Do not anticipate ownership conflicts or
other possible errors
Want to interpret the result code, refer
to the Result Codes table below.
DINT tag, in which to store a code
for the result of the execution of
the instruction.
0