State Verifier

The State Verifier is a critical sub-component of the Rollback Handler responsible for verifying that system states are consistent, valid, and meet predefined criteria. It performs checks before initiating rollback procedures to ensure the target state is safe to restore, and after rollback completion to confirm successful state restoration without corruption or data loss. The verifier operates by comparing current system state parameters against stored reference values or checksums, using validation algorithms to detect inconsistencies, corruption, or unauthorized modifications. When triggered by the Rollback Handler, it performs pre-rollback validation to ensure the target state is viable, and post-rollback verification to confirm the restored state matches expected parameters and maintains system integrity. This component is designed for integration into industrial control systems, with a compact form factor (120×80×60 mm) and a weight of 1.2–1.8 kg depending on configuration. It operates within a temperature range of -20 to 80 °C and requires a supply voltage of 24 V DC ±10%, with power consumption not exceeding 5 W. The verifier communicates via RS485 interface for data exchange with the control system. Its response time is ≤50 ms, and verification accuracy is ±0.5%. The housing offers ingress protection rated IP54–IP65, and the material is stainless steel 316L for corrosion resistance. The mean time between failures (MTBF) is ≥50,000 hours under normal conditions. All listed parameters are reference ranges that must be confirmed for the specific model and application. Standards such as IEC 60529, ASTM A240, and TIA/EIA-485 are referenced for procurement and verification, but do not imply certification or compliance of any specific product. Always verify model-specific values and standards with the legal manufacturer or supplier.

The State Verifier operates by comparing current system state parameters against stored reference values or checksums. It uses validation algorithms to detect inconsistencies, corruption, or unauthorized modifications. When triggered by the Rollback Handler, it performs pre-rollback validation to ensure the target state is viable, and post-rollback verification to confirm the restored state matches expected parameters and maintains system integrity. The component monitors its own operational parameters, such as supply voltage and temperature, to ensure reliable operation. If any parameter falls outside the specified range, the verifier signals an error, preventing unsafe rollback operations. The verification process is time-bound, with a maximum response time of 50 ms, ensuring timely feedback to the control system.