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Project Tool: Safety Laser Scanner Commissioning for Anti-Collision System using GuardLogix PLC

Specification & Integration Verification

F6 Composition for Safety Laser Scanner Commissioning for Anti-Collision System using GuardLogix PLC

● Not Golden Verified ● Project Trust Verified Runnable: 7 / 8 steps
VERIFIED SCOPE
○ ISO_13849_1_risk_graph_PL_assignment CALCULATION Runnable
○ ISO_13855_T_total_calculation CALCULATION Runnable
○ verify_T_total_complies_with_scanner_spec PASS / FAIL capable Runnable
○ CIP_Safety_CRC16_match_check PASS / FAIL capable Runnable
○ IEC_61508_DC_percentage_calculation CALCULATION Runnable
○ IEC_61508_DC_classification PASS / FAIL capable Runnable
○ IEC_61508_TI_calculation CALCULATION Partial
○ verify_TI_meets_manufacturer_recommended_maximum PASS / FAIL capable Runnable
⚠ This tool does not currently verify Safety Parameter Configuration Validator, CIP Safety Connection Integrity Checker, Safety Logic Architecture Verifier.
PROJECT INPUTS

Runnable deterministic steps: 7 / 8. Enter the project conditions used by this verification workflow. Prefilled values (20/21 inputs) are demonstration inputs, not recommended design values.

01Step 1: ISO_13849_1_risk_graph_PL_assignmentFormula
dimensionless
dimensionless
dimensionless
dimensionless
To assign the minimum required PL for the anti-collision safety function, ensuring compliance with ISO 13849-1 Annex ...
02Step 2: ISO_13855_T_total_calculationFormula
mm
mm
mm/s
mm
mm
mm/s
To ensure the end-to-end safety loop (scanner detection → PLC logic → output de-energization → machine stop) complete...
03Step 3: verify_T_total_complies_with_scanner_specValidation Rule
To confirm the calculated T_total does not exceed the maximum response time specified for the selected safety laser s...
04Step 4: CIP_Safety_CRC16_match_checkFormula
hexadecimal
hexadecimal
To guarantee bit-level integrity of the safety-relevant CIP Safety connection between scanner and GuardLogix, satisfy...
05Step 5: IEC_61508_DC_percentage_calculationFormula
count
count
count
count
To quantify the fault detection capability of the safety input channel for SIL allocation and hardware fault toleranc...
06Step 6: IEC_61508_DC_classificationValidation Rule
%
To assign DC class (low/medium/high) for use in SIL determination tables (e.g., IEC 61508-2 Table 2), which govern re...
07Step 7: IEC_61508_TI_calculationFormula
1/h
dimensionless
dimensionless
To establish the longest permissible time between manual or automatic proof tests that ensures the safety function ma...
08Step 8: verify_TI_meets_manufacturer_recommended_maximumValidation Rule
To ensure the calculated proof test interval does not exceed the maximum interval recommended by the scanner manufact...

⚠ Runnable deterministic steps: 7 / 8. 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 / 8
Project Trust11 / 11 PASS
RuntimeDeterministic
Components0 small tools, 8 steps

SCOPE & LIMITATIONS

NOT CURRENTLY VERIFIED
○ Safety Parameter Configuration Validator
○ CIP Safety Connection Integrity Checker
○ Safety Logic Architecture Verifier
These capabilities are outside the current verified workflow.

HOW THIS VERIFICATION WORKS

  1. Step 1: ISO_13849_1_risk_graph_PL_assignment — performs a deterministic calculation from the provided inputs. No acceptance criterion is applied; the result is CALCULATED only.
  2. Step 2: ISO_13855_T_total_calculation — performs a deterministic calculation from the provided inputs. No acceptance criterion is applied; the result is CALCULATED only.
  3. Step 3: verify_T_total_complies_with_scanner_spec — compares engineering inputs against deterministic thresholds and produces a PASS or FAIL decision.
  4. Step 4: CIP_Safety_CRC16_match_check — compares engineering inputs against deterministic thresholds and produces a PASS or FAIL decision.
  5. Step 5: IEC_61508_DC_percentage_calculation — performs a deterministic calculation from the provided inputs. No acceptance criterion is applied; the result is CALCULATED only.
  6. Step 6: IEC_61508_DC_classification — compares engineering inputs against deterministic thresholds and produces a PASS or FAIL decision.
  7. Step 7: IEC_61508_TI_calculation — performs a deterministic calculation from the provided inputs. No acceptance criterion is applied; the result is CALCULATED only.
  8. Step 8: verify_TI_meets_manufacturer_recommended_maximum — compares engineering inputs against deterministic thresholds and produces a PASS or FAIL decision.

This tool coordinates 4 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: ISO_13849_1_risk_graph_PL_assignment

FormulaLookup PL_req in ISO 13849-1:2015 Annex A, Figure A.1 using the 4-tuple (S, F, P, W); each parameter maps to discrete categories (e.g., S1/S2, F1/F2/F3, P1/P2, W1/W2), and intersection yields PL=a, b, c, d, or e.

Step 2: ISO_13855_T_total_calculation

Formula(S-C)/v

Step 3: verify_T_total_complies_with_scanner_spec

Validation Rule
maximum_permissible_total_response_time <= 0.15 [manufacturer_datasheet:SICK microScan3-30100712]

Step 4: CIP_Safety_CRC16_match_check

Formula= eds_declared_checksum

Step 5: IEC_61508_DC_percentage_calculation

Formula(N_detected/N_total)*(100/100)

Step 6: IEC_61508_DC_classification

Validation Rule
DC >= 90 [engineering_standard:IEC_61508-2:2010_Table_11]; DC < 90 [engineering_standard:IEC_61508-2:2010_Table_11]; DC < 60 [engineering_standard:IEC_61508-2:2010_Table_11]

Step 7: IEC_61508_TI_calculation

Formula1/(2*lambda_d*sqrt(2*pow(10,SIL)))

Step 8: verify_TI_meets_manufacturer_recommended_maximum

Validation Rule
maximum_proof_test_interval <= 8760 [manufacturer_datasheet:SICK microScan3-30100712]

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 Anti Collision System engineering verification is needed for project-specific conditions.
  • For calculation of ISO_13849_1_risk_graph_PL_assignment (Step 1).
  • For calculation of ISO_13855_T_total_calculation (Step 2).
  • For validation of verify_T_total_complies_with_scanner_spec (Step 3).
  • For validation of CIP_Safety_CRC16_match_check (Step 4).
  • For calculation of IEC_61508_DC_percentage_calculation (Step 5).
  • For validation of IEC_61508_DC_classification (Step 6).
  • For calculation of IEC_61508_TI_calculation (Step 7).
  • For validation of verify_TI_meets_manufacturer_recommended_maximum (Step 8).
  • 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 8 deterministic engineering steps: (1) ISO_13849_1_risk_graph_PL_assignment, (2) ISO_13855_T_total_calculation, (3) verify_T_total_complies_with_scanner_spec, (4) CIP_Safety_CRC16_match_check, (5) IEC_61508_DC_percentage_calculation, (6) IEC_61508_DC_classification, (7) IEC_61508_TI_calculation, (8) verify_TI_meets_manufacturer_recommended_maximum.

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: Safety Parameter Configuration Validator, CIP Safety Connection Integrity Checker, Safety Logic Architecture Verifier.

How many steps are golden verified?

0 out of 8 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.

CalculationWorkflow StepDetermine required Performance Level (PL) for anti-collision safety function based on risk graph analysis
CalculationWorkflow StepCalculate maximum allowable safety response time for laser scanner system given machine stopping time and distance
ValidationWorkflow StepCalculate maximum allowable safety response time for laser scanner system given machine stopping time and distance
ValidationWorkflow StepValidate CIP Safety connection checksum integrity for scanner-to-PLC link
CalculationWorkflow StepCalculate diagnostic coverage (DC) for safety laser scanner input channel in GuardLogix safety application
ValidationWorkflow StepCalculate diagnostic coverage (DC) for safety laser scanner input channel in GuardLogix safety application
CalculationWorkflow StepDetermine minimum test interval for safety laser scanner diagnostics based on claimed MTTFd and required SIL
ValidationWorkflow StepDetermine minimum test interval for safety laser scanner diagnostics based on claimed MTTFd and required SIL