✅ Selmo audit checklist – Functional safety & standards compliance

✅ Selmo audit checklist – functional safety & standards compliance

This checklist is used for the structured review of a project that was modelled and implemented with Selmo Standard It can be used for:

• internal approvals,

• external audits,

• CE documentation reviews,

• project releases.

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🔍 1. Model structure & composition

Acceptance criterion	Compliant?	Remark
Machine fully represented as Selmo model (PLANT → HWZ → SEQ → Zone)	✅ / ❌
Each zone assigned unambiguously (type, IO, signal, terminal)	✅ / ❌
Each SEQ modelled as a state graph with valid transitions	✅ / ❌
Bit control fully filled out (0, S, i)	✅ / ❌

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🔍 2. Functional logic & sequence control

Acceptance criterion	Compliant?	Remark
Each state named uniquely and logically	✅ / ❌
Sequence is deterministic (no jumps outside the model)	✅ / ❌
Interlocks (i) set sensibly and safely	✅ / ❌
Sequence checks (S) used correctly	✅ / ❌
Timers, repeaters, decisions parameterized correctly	✅ / ❌

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🔍 3. Safety functions

Acceptance criterion	Compliant?	Remark
CMZ zones set correctly on SEQ/HWZ/PLANT	✅ / ❌
MXIC matrix present, complete, traceable	✅ / ❌
Fault reaction on i and CMZ violation correct	✅ / ❌
Reset logic clearly represented in the model	✅ / ❌
Restart only possible in a valid state + release	✅ / ❌

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🔍 4. HMI, operation & diagnostics

Acceptance criterion	Compliant?	Remark
SEQ control shows current state & next step	✅ / ❌
Error display localized with HMI text, color and zone	✅ / ❌
Button behaviour secured by MXIC	✅ / ❌
Stepwise operation possible in manual mode	✅ / ❌
Automatic start only with valid process state	✅ / ❌

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🔍 5. Documentation & export

Acceptance criterion	Compliant?	Remark
IO mapping complete (Zone ↔ Address ↔ Terminal)	✅ / ❌
Parameter list with IN / OUT / INOUT complete	✅ / ❌
CMZ and MXIC definition exported	✅ / ❌
Change log (Model_ChangeLog.csv) present	✅ / ❌
Exported documentation matches the model	✅ / ❌

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🔍 6. Standards compliance (verifiable)

Acceptance criterion	Compliant?	Standards reference	Remark
Operating modes modelled, switchable, safe	✅ / ❌	ISO 12100
Safety functions documented & verifiable	✅ / ❌	EN ISO 13849, IEC 62061
Restart behaviour CE-compliant	✅ / ❌	ISO 12100, Machinery Regulation
PLC code generated from model, IEC 61131-3 compliant	✅ / ❌	IEC 61131-3
Risk assessment can be linked to the model	✅ / ❌	ISO 12100

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📝 Conclusion

• Review performed on: _____________

• Project name / model version: _____________

• Reviewer / role: _____________

• Status: 🔲 passed 🔲 with conditions 🔲 failed

Signature / approval: __________________________