Industrial automation systems last longer and perform more reliably when they are routinely assessed and maintained. Regular health checks help identify software issues, hardware risks, and environmental factors before they lead to downtime. A proactive approach protects uptime, improves safety, and extends the lifecycle of PLC, HMI, and SCADA investments.
Tips for prolonging your automation system through regular control system health checks and preventative maintenance
Why Preventative Maintenance Matters for Automation Systems
Many control system failures are preventable. Diagnostic warnings, outdated components, thermal stress, and backup gaps often exist long before a downtime event occurs. Consistent health assessments allow teams to detect these risks early and take corrective action before production is impacted.
A structured program supports:
- Increased system reliability
- Reduced unplanned downtime
- Longer equipment lifespan
- Lower lifecycle costs
- Accurate system documentation
Software Health Checks and Maintenance
Routine software reviews are foundational to automation system reliability. These checks ensure programs, communications, and security controls remain stable and recoverable.
Key practices include:
Monitor system diagnostics
Check equipment displays and connect to control system software to review logs for errors or warnings that require attention.
Maintain current backups and System Documentation
Keep up-to-date backups of PLC, HMI, and SCADA programs and parameter files. If a component fails, having the current program on hand to load into the replacement component can help minimize downtime. Review drawings, manuals, and spare part lists to ensure they match the current system makeup.
Verify cybersecurity protections
Ensure internet-accessible systems have proper firewall configuration, security settings, and current updates installed.
Test redundancy and failover systems
For redundant architectures, periodically test automatic failover and recovery during non-production windows to confirm proper operation.
Hardware Health Checks and Maintenance
Physical infrastructure plays a major role in system longevity. Environmental conditions, mounting integrity, and component condition directly impact reliability.
Inspect electrical components
Look for physical damage and confirm safety covers are in place to prevent electrical exposure.
Verify proper mounting and connections
Ensure components are securely mounted to prevent stress on wiring and connections that could shorten equipment life.
Maintain cabinet temperature control
Check cooling and heating systems, replace filters, and ensure condensate drains function correctly to maintain proper cabinet temperatures and conditions.
Perform thermal inspections
Use thermometers or thermal imaging to confirm components operate within specified ranges and to identify loose or overheating connections. Operating components outside of their specified temperature range can shorten their life
Battery and Power System Management
Backup power and memory retention systems are often overlooked but critical for continuity.
- Inspect and replace batteries in PLCs, HMIs, servo drives, and UPS systems as needed.
- Follow manufacturer procedures when replacing batteries to avoid data or program loss.
Obsolescence and Lifecycle Planning
Aging components can continue operating but present sourcing and reliability risks.
- Identify obsolete or end-of-life components.
- Maintain spare parts where feasible.
- Evaluate modernization opportunities to reduce future downtime risk and procurement challenges.
Safety Device Verification
Routine testing ensures safety mechanisms perform during emergencies rather than failing when needed most.
- Periodically test E-stops, gate switches, light curtains, and area scanners.
- Confirm devices are not bypassed and operate as intended.
Conclusion
Preventative maintenance is the most effective way to extend the life of an industrial automation system. Regular health assessments uncover risks early, improve reliability, and help teams plan for upgrades before failures occur.
With consistent attention to software integrity, hardware condition, safety systems, and environmental factors, organizations can keep their control systems operating efficiently and delivering value for years to come.