Fault Diagnosis

From a process perspective, Fault Diagnosis refers to: Process of analyzing and locating faults. Consistent diagnosis here reduces downtime without compromising safeguards. Managed well, it improves process repeatability and lowers correction workload. Use alarm history with process context to distinguish root events from secondary symptoms.

How to Apply It

• Differentiate root alarm from secondary cascade alarms.
• Escalate repeating faults with trend evidence to maintenance.
• Re-verify safety functions after electrical or control service.
• Capture alarm context before reset: code, axis state, and recent blocks.

On-Machine Signals

• Alarm recurrence after quick reset
• Interlock mismatch with door or guard status
• Different alarms triggered by same process step

Troubleshooting Signals

Fast reset culture hides intermittent faults and increases safety exposure. Repeated alarms often involve process triggers, not only hardware failure.

Scaling to Batch Production

Teams usually stabilize this area by using one standard restart checklist across shifts.

• Keep setup records and inspection evidence linked to each process revision.
• Re-validate after tooling, fixture, or control-logic changes.
• Use first-article and restart checks as mandatory release gates.