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IEC 62443-4-2 Clause 10 – Timely Response to Events

ISA/IEC 62443-4-2, Clause 10 defines Foundational Requirement FR 6 (TRE) and the associated component requirements (CRs) and requirement enhancements (REs) used when claiming Security Level capability for this FR on a component.

Make security-relevant events visible and monitorable so operators and tools can respond in time.

Teaching note: Summaries paraphrase ISA/IEC 62443-4-2 for learning. They are not verbatim extracts — always use the published standard for normative wording, RE text and SL mappings (see Annex B). Component-type specifics also appear under Clauses 12–15.

Reference: ISA/IEC 62443-4-2, Clause 10
Related: Part 4-2 overview | Common Component Security Constraints | IEC 62443-3-3 FR 6 | Annex B mapping

Component requirement pages: Cl. 5 | Cl. 6 | Cl. 7 | Cl. 8 | Cl. 9 | Cl. 10 | Cl. 11

Purpose

Make security-relevant events visible and monitorable so operators and tools can respond in time.

Requirement enhancements under each CR raise the capability needed for higher SL-C(TRE) claims. Exact RE text and which SL columns they populate are in the standard and Annex B.

Component requirements in this FR

CR summaries

CR 6.1: Audit log accessibility

Reference: ISA/IEC 62443-4-2, Clause 10

Summary
Components must provide the capability for authorized humans and/or tools to access audit logs on a read-only basis.

CR 6.2: Continuous monitoring

Reference: ISA/IEC 62443-4-2, Clause 10

Summary
Components must provide the capability to be continuously monitored using commonly accepted security industry practices and recommendations to detect, characterize and report security breaches in a timely manner.

Key takeaways