24604
Equal/Higher Priority Command in Process
Allen-Bradley · Logix 5000 Advanced Process Control and Drives
What does 24604 mean?
The SCMD (Equipment Sequence Command) instruction failed because an equal or higher priority command is currently being processed by the Equipment Sequence. This fault prevents concurrent command execution, ensuring that commands are processed in an orderly manner based on their priority and arrival.
Common Causes
- Another command of equal or higher priority is actively processing within the Equipment Sequence.
- Multiple SCMD instructions are attempting to issue commands simultaneously to the same Equipment Sequence.
- The Equipment Sequence's command queue is busy with an existing operation.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Wait for the currently processing command to complete its execution before issuing a new SCMD instruction.
- 2
Implement logic to ensure that only one SCMD instruction is active or pending at a time for a given Equipment Sequence.
- 3
Review the Equipment Sequence's command processing mechanism or queue if available to understand command handling.
Verified technical data. Last updated: March 2026
Related Faults
Source: Allen-Bradley Logix 5000 Advanced Process Control and Drives