SCADA Migration
Migrate Legacy SCADA Systems Without Compromising Production
Industrial SCADA systems can remain operational for many years, often becoming deeply embedded within production processes. As software platforms, operating systems and hardware reach the end of their supported lifecycle, however, maintaining these systems becomes increasingly difficult and operational risk begins to increase.
SCADA migration provides a structured route from ageing or unsupported technology to a modern, maintainable platform while preserving the critical functionality your operation depends upon.
At Stratos, we help manufacturers migrate legacy SCADA systems to modern platforms with careful planning, testing and commissioning. Our engineers work to minimise production disruption while protecting process functionality, operational data and integration with existing automation equipment.
What Is SCADA Migration?
SCADA migration is the process of transferring an existing supervisory control system from an ageing or unsupported environment to a newer platform or system architecture.
Depending on the project, migration may involve:
• SCADA software.
• Operator screens.
• PLC communications.
• Tags and databases.
• Alarm configurations.
• Historical data.
• Trends.
• User accounts and permissions.
• Reports.
• Server infrastructure.
• Industrial communication networks.
The objective is not simply to replace old software. A successful migration ensures the new system continues to provide the functionality operators and engineering teams require while establishing a more reliable platform for the future.
Why Migrate a Legacy SCADA System?
Older SCADA systems can remain functional long after the technology supporting them has become obsolete.
Common reasons for migration include:
• Unsupported SCADA software.
• Unsupported operating systems.
• Ageing server hardware.
• Increasing system failures.
• Cybersecurity concerns.
• Limited manufacturer support.
• Difficulty integrating modern PLCs.
• Poor availability of technical expertise.
• Limited reporting and data capabilities.
• Expansion of production requirements.
Planning migration before the existing system fails provides greater control over costs, implementation and production downtime.
Legacy SCADA Migration
Legacy SCADA environments often contain years of valuable engineering work.
Operator screens, alarm configurations, process tags and communications may have been developed and refined over the lifetime of the plant.
Our engineers assess the existing system to determine what should be:
• Retained.
• Migrated.
• Reconfigured.
• Redesigned.
• Replaced.
• Documented.
This helps protect useful existing functionality while avoiding the unnecessary transfer of outdated or inefficient configurations into the new system.
SCADA Platform Migration
Migration may involve moving between versions of the same SCADA platform or transitioning to a completely different technology.
The process may include:
• Reviewing the existing architecture.
• Mapping PLC communications.
• Exporting existing configuration data.
• Recreating or converting tags.
• Migrating operator screens.
• Rebuilding alarm structures.
• Configuring historical data.
• Establishing user permissions.
• Testing communications.
• Validating system functionality.
Every migration strategy is developed around the existing installation and the requirements of the target platform.
Protecting PLC Communications
The SCADA system sits above the PLC control layer, making communication between the two critical during migration.
Our engineers assess:
• PLC platforms.
• Existing communication protocols.
• Tag structures.
• Network architecture.
• Data addressing.
• Communication drivers.
• Existing gateways.
• Third-party interfaces.
This allows the new SCADA environment to be developed without unnecessarily changing PLC systems that remain reliable and suitable for continued operation.
Migrating SCADA Screens and Operator Interfaces
A migration provides an opportunity to review existing operator interfaces rather than simply copying every screen into the new system.
Existing screens can be assessed for:
• Navigation.
• Process visibility.
• Alarm presentation.
• Equipment status.
• Consistency.
• Diagnostic information.
• Operator usability.
Where appropriate, interfaces can be modernised while retaining familiar workflows that help operators transition to the new system.
Alarm Migration and Rationalisation
Alarm configurations can become increasingly complicated as SCADA systems evolve.
During migration, existing alarms can be reviewed to determine whether they remain relevant and appropriately prioritised.
This may involve:
• Migrating critical alarms.
• Removing redundant alarms.
• Improving alarm descriptions.
• Reviewing alarm priorities.
• Standardising alarm structures.
• Improving acknowledgement processes.
• Maintaining historical alarm records where required.
This creates an opportunity to improve alarm management rather than transferring existing problems to the new platform.
Historical Data Migration
Historical SCADA data can provide valuable information about production performance, equipment behaviour and recurring faults.
Where technically appropriate and required by the project, migration planning can consider:
• Process histories.
• Alarm histories.
• Production records.
• Trend data.
• Reporting databases.
• Archived information.
The requirements for historical data should be identified early because migration options vary considerably between SCADA platforms and database technologies.
Phased SCADA Migration
For operational facilities, replacing an entire SCADA system in a single changeover may create unnecessary production risk.
A phased migration strategy can allow sections of the new system to be developed and tested before final implementation.
A typical approach may include:
• Existing system assessment.
• Migration planning.
• New architecture development.
• Offline configuration.
• PLC communication testing.
• Screen and alarm validation.
• Factory testing where appropriate.
• Planned system changeover.
• Site testing.
• Final commissioning.
This approach helps reduce risk and allows migration activities to be coordinated around production schedules.
SCADA Migration Testing
Thorough testing is essential before transferring operational responsibility to the new SCADA environment.
Testing may include:
• PLC communication verification.
• Tag validation.
• Operator screen testing.
• Alarm testing.
• Historical data verification.
• Trending.
• User permissions.
• Reporting.
• Network communications.
• Functional testing.
Where appropriate, testing can be completed away from the live production environment before final site implementation.
SCADA Migration and Commissioning
The final migration stage involves transitioning the new system into operational use.
Commissioning may include:
• Final communications checks.
• Live I/O verification.
• Alarm validation.
• Operator interface testing.
• Process monitoring.
• System backups.
• Documentation updates.
• Operator familiarisation.
• Final handover.
Careful commissioning helps ensure the new SCADA system performs reliably before the legacy environment is retired.
Why Choose Stratos for SCADA Migration?
Successful SCADA migration requires more than knowledge of supervisory software. It requires an understanding of PLC programming, industrial communications, control systems and the production processes that depend on them.
Stratos takes a complete automation approach to SCADA migration, assessing both the existing supervisory system and the control infrastructure beneath it.
Whether you're moving away from an unsupported SCADA platform, replacing ageing infrastructure or preparing your automation environment for future expansion, our engineers develop practical migration strategies designed to minimise risk and protect production.
Move from Legacy SCADA with Confidence
An unsupported SCADA platform can become a growing risk to production, but migration does not have to mean starting again. Stratos develops structured SCADA migration strategies that protect critical functionality, minimise disruption and provide a reliable foundation for future automation. Speak to our engineers about planning your migration from legacy SCADA technology.
Frequently Asked Questions
What is SCADA migration?
SCADA migration is the process of moving an existing SCADA system from ageing or unsupported technology to a newer platform while preserving the operational functionality required by the facility.
Can a SCADA system be migrated without replacing existing PLCs?
Yes. Existing PLCs can often remain in operation if they are reliable and compatible with the new SCADA environment, either directly or through appropriate communication technologies.
Can existing SCADA screens be migrated?
In many cases, existing screens can be converted, recreated or redesigned depending on the original and target SCADA platforms. Migration also provides an opportunity to improve screen layouts and usability.
Can historical SCADA data be transferred?
Potentially. The ability to migrate historical data depends on the existing SCADA platform, database format and target system. Historical data requirements should therefore be assessed during migration planning.
How do you minimise downtime during SCADA migration?
Migration can often be developed and tested offline before implementation, with final changeover planned around production schedules. Phased migration may also be appropriate for larger systems.