Allen-Bradley LOGIX 5000 Reference Manual page 474

Chapter 8 Equipment Sequence
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regardless of ownership. If the SCMD instruction must execute regardless of
ownership, use an SOVR instruction instead of an SCMD instruction.
Important:
When a tag is assigned to store the result of an SCMD instruction, the instruction
returns one of five result codes when it runs. Result code 0 indicates that the
SCMD instruction ran successfully. The other four codes indicate that the
instruction did not run successfully and provide additional information about the
reason for the instruction failure.
Available Languages
The SCMD instruction is available in the following languages.
Ladder Diagram
Function Block
This instruction is not available in Function Block.
Structured Text
SCMD(SequenceName,Command,Result)
Supported Operands
The SCMD instruction uses the following operands.
Operand Type
Sequence Name Sequence
Command Command
Result DINT
Rockwell Automation Publication 1756-RM006K-EN-P - November 2018
The SOVR instruction is intended for emergencies only. Control Engineers should use
caution when deciding to use it.
Format
Name of the Equipment
Sequence
Name of the command
Immediate tag
Description
Equipment Sequence to change to a different state. For
example, Make_Product_101.
Command to send to the Equipment Sequence and change
state. Send one of these commands: START, RESTART, HOLD,
STOP, ABORT, or RESET.
For an instruction to return a success or failure code, enter a
DINT tag where the result code is stored. Otherwise, enter 0.