建筑工程
ToolFusion / Coiler / Engineering Tools

Project Tool: Functional Safety Validation of Machine Guarding Systems for Coiler

Specification & Integration Verification

F6 Composition for Functional Safety Validation of Machine Guarding Systems for Coiler

● Not Golden Verified ● Project Trust Verified Runnable: 5 / 6 steps
VERIFIED SCOPE
○ Determine minimum required diagnostic coverage for PL e PASS / FAIL capable Runnable
○ Evaluate light curtain’s documented diagnostic coverage against PL e requirement CALCULATION Runnable
○ Calculate actual loop resistance from voltage drop and current CALCULATION Runnable
○ Compute percentage increase in loop resistance vs. nominal CALCULATION Runnable
○ Estimate diagnostic coverage degradation from resistance increase CALCULATION Partial
○ Verify diagnostic coverage degradation ≤ 5% PASS / FAIL capable Runnable
⚠ This tool does not currently verify ISO_13849_1_DC_Threshold_Calculation, Uncertainty_Aware_Stopping_Time_Verification.
PROJECT INPUTS

Runnable deterministic steps: 5 / 6. Enter the project conditions used by this verification workflow. Prefilled values (9/10 inputs) are demonstration inputs, not recommended design values.

01Step 1: Determine minimum required diagnostic coverage for PL eValidation Rule
years
dimensionless
To establish the DC threshold needed to achieve Performance Level e when MTTFd = 100 yr and CCF mitigation is Level B.
02Step 2: Evaluate light curtain’s documented diagnostic coverage a...Formula
dimensionless
dimensionless
To assess conformance of manufacturer-declared DC (e.g., 99.5%) with minimum required DC for PL e.
03Step 3: Calculate actual loop resistance from voltage drop and cu...Formula
V
A
To quantify real-world wiring degradation affecting fault detectability.
04Step 4: Compute percentage increase in loop resistance vs. nominalFormula
Ω
Ω
To estimate potential fault masking severity: higher resistance increases likelihood of undetected open-circuit faults.
05Step 5: Estimate diagnostic coverage degradation from resistance ...Formula
dimensionless
To translate measured resistance drift into DC impact using empirical correlation from ISO 13849-1 Annex K guidance o...
06Step 6: Verify diagnostic coverage degradation ≤ 5%Validation Rule
To ensure resistance-related fault masking does not compromise target PL per ISO 13849-1 Annex K tolerance.

⚠ Runnable deterministic steps: 5 / 6. Steps marked "Input Required" or "Example Input Required" need user-provided engineering values before calculation.

Deterministic calculation · Results become stale when engineering inputs change.
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ENGINEERING EVIDENCE

Golden Coverage0 / 6
Project Trust11 / 11 PASS
RuntimeDeterministic
Components0 small tools, 6 steps

SCOPE & LIMITATIONS

NOT CURRENTLY VERIFIED
○ ISO_13849_1_DC_Threshold_Calculation
○ Uncertainty_Aware_Stopping_Time_Verification
These capabilities are outside the current verified workflow.

HOW THIS VERIFICATION WORKS

  1. Step 1: Determine minimum required diagnostic coverage for PL e — compares engineering inputs against deterministic thresholds and produces a PASS or FAIL decision.
  2. Step 2: Evaluate light curtain’s documented diagnostic coverage against PL e requirement — performs a deterministic calculation from the provided inputs. No acceptance criterion is applied; the result is CALCULATED only.
  3. Step 3: Calculate actual loop resistance from voltage drop and current — performs a deterministic calculation from the provided inputs. No acceptance criterion is applied; the result is CALCULATED only.
  4. Step 4: Compute percentage increase in loop resistance vs. nominal — performs a deterministic calculation from the provided inputs. No acceptance criterion is applied; the result is CALCULATED only.
  5. Step 5: Estimate diagnostic coverage degradation from resistance increase — performs a deterministic calculation from the provided inputs. No acceptance criterion is applied; the result is CALCULATED only.
  6. Step 6: Verify diagnostic coverage degradation ≤ 5% — compares engineering inputs against deterministic thresholds and produces a PASS or FAIL decision.

This tool coordinates 2 validation steps and 4 calculation steps. The overall engineering decision uses ALL_REQUIRED_VALIDATION_PASS aggregation: only validation steps contribute to the pass/fail outcome; calculation steps produce data only.

METHODS & EQUATIONS

All formulas are resolved from canonical runtime definitions and executed deterministically by the client-side engine.

Step 1: Determine minimum required diagnostic coverage for PL e

Validation Rule
MTTFd >= 100 [engineering_standard:ISO_13849-1:2015]

Step 2: Evaluate light curtain’s documented diagnostic coverage against PL e requirement

FormulaCompare DC_decl ≥ DC_min_PL_e; if true, assign DC_pass = true; else false. Document deviation rationale per ISO 13849-2 Annex F.

Step 3: Calculate actual loop resistance from voltage drop and current

FormulaV_drop/I_nom

Step 4: Compute percentage increase in loop resistance vs. nominal

Formula(R_actual-R_loop)/R_loop

Step 5: Estimate diagnostic coverage degradation from resistance increase

Formula0.05 * δR

Step 6: Verify diagnostic coverage degradation ≤ 5%

Validation Rule
ΔDC <= 0.05 [verified_design_rule:ISO_13849_1_2015_Annex_K_Fault_Masking_Tolerance]

UNDERSTANDING THE RESULTS

PASS
A proven validation criterion passed. The engineering input satisfies the deterministic threshold.
FAIL
A proven validation criterion failed. The engineering input does not satisfy the deterministic threshold.
CALCULATED
A deterministic calculation completed, but no acceptance criterion exists for this step. CALCULATED does NOT mean PASS.
RESULT NOT VALID
Runtime executed but engineering validity requirements were not met.
INCOMPLETE
Required inputs or workflow steps are incomplete.

The overall decision reflects only validation steps. Calculation steps produce numerical results without pass/fail claims.

WHEN TO USE THIS TOOL

  • When deterministic Coiler engineering verification is needed for project-specific conditions.
  • For validation of Determine minimum required diagnostic coverage for PL e (Step 1).
  • For calculation of Evaluate light curtain’s documented diagnostic coverage against PL e requirement (Step 2).
  • For calculation of Calculate actual loop resistance from voltage drop and current (Step 3).
  • For calculation of Compute percentage increase in loop resistance vs. nominal (Step 4).
  • For calculation of Estimate diagnostic coverage degradation from resistance increase (Step 5).
  • For validation of Verify diagnostic coverage degradation ≤ 5% (Step 6).
  • For deterministic pre-checks before formal engineering review or submission.

When NOT to use this tool: This tool does not replace laboratory testing, formal engineering analysis by a licensed professional, or code-compliance certification. It performs deterministic threshold comparison and calculation only.

ENGINEERING FAQ

What does this verification tool check?

This tool performs 6 deterministic engineering steps: (1) Determine minimum required diagnostic coverage for PL e, (2) Evaluate light curtain’s documented diagnostic coverage against PL e requirement, (3) Calculate actual loop resistance from voltage drop and current, (4) Compute percentage increase in loop resistance vs. nominal, (5) Estimate diagnostic coverage degradation from resistance increase, (6) Verify diagnostic coverage degradation ≤ 5%.

What does a PASS result mean?

A PASS result means the validation step's deterministic threshold comparison was satisfied. It does not constitute laboratory certification or code compliance.

What does a CALCULATED result mean?

A CALCULATED result means the deterministic calculation completed, but no acceptance criterion is applied to this step. CALCULATED does NOT mean PASS.

What is not currently verified by this workflow?

Capabilities not currently verified include: ISO_13849_1_DC_Threshold_Calculation, Uncertainty_Aware_Stopping_Time_Verification.

How many steps are golden verified?

0 out of 6 steps have been verified with deterministic golden test cases.

COMPONENT TOOLS

This workflow currently contains no bound executable Small Tools. Steps are defined by engineering methods and reference materials.

ValidationWorkflow StepAssess diagnostic coverage factor (DC) for dual-channel photoelectric light curtain architecture
CalculationWorkflow StepAssess diagnostic coverage factor (DC) for dual-channel photoelectric light curtain architecture
CalculationWorkflow StepConvert measured voltage drop across safety input circuit to equivalent diagnostic coverage impact
CalculationWorkflow StepConvert measured voltage drop across safety input circuit to equivalent diagnostic coverage impact
CalculationWorkflow StepConvert measured voltage drop across safety input circuit to equivalent diagnostic coverage impact
ValidationWorkflow StepConvert measured voltage drop across safety input circuit to equivalent diagnostic coverage impact