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Restore or replace a failed component while preserving its system role.
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Backup · Restore · Rebuild · Recovery · Lifecycle Assurance
O-PAS backup, restore and disaster recovery Recover the integrated system, not just individual products
A practical guide for owners, EPCs and system integrators defining how an O-PAS multi-vendor system will be backed up, rebuilt, restored and verified after component failure, configuration loss or a wider recovery event.
The short answer
An O-PAS recovery plan must preserve enough of the accepted integrated baseline to rebuild required control capability, not merely restore separate device configuration files.
The recovery set should include exact products and versions, configurations, IEC 61131 control applications, source and libraries, runtime and deployment dependencies, interfaces, identities and certificates, required system services, engineering tools, licenses, restoration procedures and verified recovery evidence. Product backup features can support this process, but successful system recovery depends on restoring the required dependencies in the correct order and proving the recovered system against project requirements.
01 · Recovery basis
Define what the plant must be able to recover
Recovery planning starts with required operating capability and credible loss scenarios. Define which functions must be restored, from which accepted state, within what constraints and under whose authority.
Lost state
Return configuration, application or security state to a known accepted position.
Control asset recovery
Rebuild and deploy IEC 61131 applications from controlled assets.
Shared-service loss
Recover identity, trust, naming, time, monitoring and engineering services in sequence.
Trusted recovery
Restore from protected assets when current state cannot be trusted.
Wider rebuild
Re-establish an integrated baseline after multi-component loss.
Recovery stop condition: every product has a backup, but no one can demonstrate how to rebuild the integrated control capability.
02 · Recoverable baseline
Recovery starts from an authoritative accepted state
The recovery basis must connect product identities and configurations to applications, interfaces, security assets, system services and accepted evidence.
Installed identity
- Exact products and versions
- Architecture roles
- Firmware and software
- Approved deviations
Applications
- IEC 61131 source
- Libraries and versions
- Runtime allocations
- Build and deployment assets
Interfaces
- Interface definitions
- Information mappings
- Commands and states
- Failure and restoration expectations
Operating dependencies
- Identity and certificates
- Naming and time
- Monitoring and logging
- Engineering tools and licenses
Use the O-PAS System Management and Lifecycle Operations Guide to keep the accepted baseline synchronized.
03 · Backup scope
Back up everything required to recreate the accepted capability
If an asset is required to rebuild, configure, authenticate, deploy, test or return the system to service, preserve or reproducibly recreate it.
Product and system state
- Product configuration
- System-management configuration
- Interface mappings
- Version manifest
Owner control assets
- IEC 61131 source
- Libraries
- Build inputs
- Deployment packages
Identity and trust
- Certificate material
- Trust configuration
- Role definitions
- Recovery credentials
Engineering capability
- Engineering tools
- Supported versions
- Licenses
- Build instructions
Reference state
- Requirements
- Test procedures
- Expected results
- Approved exceptions
Recovery knowledge
- Restoration sequence
- Dependencies
- Decision authority
- Validation steps
04 · IEC 61131 applications
Recover the application as an executable engineering asset
Source alone is not a recovery package. Preserve source, libraries, versions, build inputs, runtime assumptions, allocation, deployment method and verification assets.
Authoritative assets
- IEC 61131 source
- Libraries
- Versions
- Parameters
Reproducible path
- Engineering tools
- Build instructions
- Licenses
- Expected outputs
Execution environment
- Runtime identity
- Supported features
- Dependencies
- Application allocation
Accepted behavior
- Control functions
- Sequences and interlocks
- Alarms
- Restart behavior
Portability and recovery solve different problems
Portability can reduce dependency on one execution environment. Recovery still requires controlled assets, a compatible runtime, deployment and verification.
Use the O-PAS Application Portability Guide →05 · Trusted recovery
Restore trust without restoring compromised state
Plan how identities, certificates, privileges and trust relationships are recovered, revoked or re-established when current security state cannot be trusted.
Accounts and roles
- Required identities
- Privileges
- Custody
- Emergency access
Certificates
- Certificate inventory
- Issuing dependencies
- Renewal and revocation
- Re-enrolment method
Use the O-PAS Cybersecurity Requirements Guide for identity, trust, protected backups and incident-recovery requirements.
06 · Restoration dependencies
Recovery order is part of the architecture
Products cannot always be restored independently. Define prerequisites and sequence so shared services, runtimes, interfaces and applications return in a controlled order.
Establish trusted infrastructure
Recover required platform, identity, trust, naming and time services.
Restore system services
Bring monitoring, logging, inventory, configuration and engineering services to the required state.
Restore products and interfaces
Recover exact configurations and verify required boundaries.
Deploy control applications
Build or restore IEC 61131 applications into their accepted runtime allocations.
Verify integrated behavior
Test functions, interfaces, alarms, failure response and recovery.
Authorize return to service
Review evidence, exceptions and residual risk before operating release.
07 · Recovery scope
Separate component restoration from system recovery
A product can be restored successfully while the integrated control function remains unavailable. Recovery criteria should therefore follow the operating function and its dependencies.
| Recovery level | Question | Evidence |
|---|---|---|
| Component | Can the product be rebuilt or restored to its required configuration? | Identity, configuration, health and supplier procedure. |
| Interface | Do required providers and consumers exchange the correct information and state? | Boundary verification, diagnostics and failure/restoration results. |
| Application | Do IEC 61131 applications execute their required control behavior? | Deployment, functional and recovery tests. |
| System | Can the integrated system support required operation after the recovery event? | Integrated verification and owner release evidence. |
08 · Clean rebuild
Be able to recover without trusting the failed installation
A credible disaster-recovery plan should define when restoration from existing state is acceptable and when a clean rebuild from protected assets is required.
Known installation sources
Preserve or reproducibly obtain required supported software, firmware and engineering tools.
Protected accepted state
Maintain controlled copies separate from the operating failure domain.
Re-establish security
Define identity, certificate and credential re-creation without carrying compromised trust forward.
09 · Recovery objectives
Set recovery requirements from operating consequence
Recovery targets should reflect the process function, acceptable outage, recoverable data or configuration state, restoration dependencies and resources available during the event.
| Requirement | Project question |
|---|---|
| Recovery time | How long may the required control capability remain unavailable? |
| Recovery point | Which configuration, application and operating state must be recoverable? |
| Minimum capability | Which functions must return first, and which may remain degraded? |
| Resources | Which people, suppliers, tools, spares, licenses and infrastructure must be available? |
| Authority | Who declares the recovery state acceptable for return to operation? |
10 · Recovery testing
A backup is evidence only after restoration has been demonstrated
Test representative recovery scenarios before handover and periodically through the lifecycle. The test should prove the assets, sequence, tools, access, supplier participation and verification method needed under realistic conditions.
Configuration recovery
- Known backup
- Clean target
- Restore procedure
- Configuration comparison
Application recovery
- Source and libraries
- Toolchain
- Runtime
- Functional verification
System recovery
- Dependencies
- Interfaces
- Failure behavior
- Return-to-service evidence
Use a representative environment before testing destructive recovery paths
Recovery exercises should reproduce the affected baseline closely enough to prove the method without creating unnecessary operating risk.
Use the Integration Environment and Testbed Planning Guide →11 · Recovery acceptance
Keep product capability, system recovery and project acceptance separate
A product may provide backup and restore functions or hold applicable conformance evidence. The project must still prove that the assembled system can recover its required functions and that the owner accepts the demonstrated recovery result.
| Evidence layer | What it establishes |
|---|---|
| Product conformance and supplier evidence | Capabilities and requirements supported by the exact product and version within the stated scope. |
| System recovery verification | That selected products, applications, interfaces and services can be restored together in the project environment. |
| Project acceptance | That the recovered system satisfies contractual, functional, operating, cybersecurity and lifecycle requirements and may return to service. |
Use the O-PAS Commissioning, Site Acceptance and Cutover Guide to place site recovery demonstrations inside the project acceptance basis.
12 · Lifecycle synchronization
Every material change can change the recovery set
Update recovery assets whenever products, versions, configurations, applications, libraries, interfaces, identities, certificates, tools or support dependencies change.
Reconcile after release
Update backups, manifests, procedures and regression evidence when the accepted baseline changes.
Check recoverability
Verify protected assets, access, tools, licenses and supplier positions remain usable.
Repeat recovery tests
Re-test representative scenarios after material changes and at the owner-defined lifecycle cadence.
Use the O-PAS Configuration Management, Change Control and Regression Testing Guide to keep recovery assets aligned with the accepted baseline.
13 · Roles and supplier obligations
Assign recovery responsibilities before the failure
| Party | Recovery responsibility |
|---|---|
| Owner/operator | Defines operating recovery requirements, custody, risk decisions and return-to-service authority. |
| System integrator | Maintains the integrated dependency and restoration model and coordinates cross-supplier recovery verification. |
| Component suppliers | Provide supported product backup, restore, rebuild, compatibility and escalation procedures for assigned scope. |
| Cybersecurity authority | Defines trusted recovery, identity, certificate, credential and compromised-state requirements. |
| EPC/project team | Delivers and demonstrates the lifecycle-ready recovery set before handover. |
Use the O-PAS Multi-Vendor Operations and Support Model Guide to connect recovery responsibilities to the operating escalation model.
14 · Connected guidance
Connect recovery to the complete lifecycle control set
Lifecycle
System Management and Lifecycle
Maintain the baseline, dependencies and recovery assets.
ChangeConfiguration and Regression
Keep recovery assets synchronized with every accepted change.
SecurityCybersecurity Requirements
Define trusted backups, identities, certificates and incident recovery.
ApplicationsApplication Portability
Preserve IEC 61131 source, libraries, runtime dependencies and deployment assets.
TestingIntegration Environment Planning
Exercise recovery without unnecessary production risk.
AcceptanceCommissioning and Cutover
Demonstrate recovery and operational readiness before handover.
Frequently asked questions
O-PAS backup, restore and disaster recovery questions
What should be backed up in an O-PAS system?
Preserve the assets required to recreate the accepted capability: product and system configuration, IEC 61131 source and libraries, runtime and deployment dependencies, interface definitions, identities and certificates, engineering tools and licenses, recovery procedures and accepted verification evidence.
Are device configuration backups enough?
No. They may recover individual products, but integrated recovery can also depend on applications, runtimes, interfaces, shared services, identities, certificates, tools, licenses and restoration order.
How should IEC 61131 applications be recovered?
Maintain controlled source, libraries, versions, build inputs, compatible runtime information, deployment assets and functional verification so the application can be rebuilt or restored and returned to accepted behavior.
How should recovery order be defined?
Map prerequisites among infrastructure services, identities, trust, products, runtimes, interfaces and applications, then define a sequence that restores dependencies before the functions that rely on them.
How often should recovery be tested?
Test before handover, after material changes that affect recoverability, and at an owner-defined lifecycle cadence based on operating consequence and recovery risk.
Does O-PAS product conformance prove disaster recovery?
No. Product conformance addresses the evaluated product scope. The project must separately verify integrated recovery behavior and obtain project acceptance for the recovered operating system.
How does CSI support O-PAS recovery planning?
CSI helps owners and EPCs define recoverable baselines, backup scope, application and runtime dependencies, restoration order, trusted recovery, representative recovery testing, supplier responsibilities and project acceptance evidence.
Before a backup becomes an untested assumption
Prove that the complete O-PAS system can be recovered
CSI can help define the recoverable baseline, restoration sequence, recovery assets, supplier responsibilities and verification required before handover.
O-PAS™ and Open Process Automation™ are trademarks of The Open Group. CSI is an independent commercial licensee of the O-PAS Standard. This guide is a project and lifecycle planning aid and does not imply endorsement by The Open Group. The applicable contracts, owner standards, approved recovery procedures, current O-PAS Standard and current certification records govern the delivered and operated system.