Know whether your PLC really conforms to your Cause & Effect Matrix
VERTESIS uses VertSAFE to systematically validate implemented safety logic against your Cause & Effect specification, from engineering documentation and TAG mapping to automated testing, nonconformity analysis and retesting.
End-to-end C&E × PLC validation delivered as an engineering service
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Get objective, traceable evidence of what has been tested, how mature the PLC implementation is,
and how much of the implemented logic conforms to the C&E.
Know system readiness before FAT. Assess the implementation with traceable Coverage, Maturity and Conformity indicators before formal FAT activities begin.
Verify that the installed system still reflects the engineering specification after modifications, maintenance and software changes.
One service. Four validation stages.
01
We convert Excel, PDF, DWG and other legacy documentation into structured engineering data, then analyze syntax, structure, inter-page relationships, missing information, TAG consistency and engineering-rule deviations.
Deliverable: Structured C&E + C&E Compliance Report
02
VERTESIS maps every testable cause and effect to its PLC variable and prepares the required physical, simulated, emulated or virtual PLC environment. Connectivity is supported through OPC DA, OPC UA or an OPC UA gateway.
Deliverable: C&E ↔ PLC Mapping Matrix
03
VertSAFE generates relevant test scenarios from the C&E and executes black-box tests against observable PLC input/output behavior. The methodology is independent of PLC vendor, architecture and programming language, subject to OPC connectivity.
PSD, ESD, HSD, FGS, HFGS, alarms, trips, voting logic, delays and setpoints
04
Automated testing produces traceable evidence of PLC behavior relative to the C&E. Each deviation is analyzed with relevant C&E, PLC and change information; after correction, affected tests can be repeated to verify closure.
Verdicts: OK - Conforming, DF - Dangerous Failure, SF - Spurious Failure
Beyond individual pass/fail results, VertSAFE provides indicators that make alignment between the specification and the implemented PLC logic visible and traceable.
How much of the specified safety logic has actually been tested? Measures the proportion of the C&E that can be exercised during validation.
How much of the specified logic has been successfully implemented? Provides visibility into PLC implementation readiness.
How much of the tested implementation correctly behaves according to the C&E? Delivers objective evidence of specification alignment.
Proven at offshore scale
Representative campaigns have included P-51, P-58, P-62 and P-84. In one PSD validation, 3,890 automated tests identified 21 C&E × PLC inconsistencies in a system that had already undergone conventional testing.
1,000
automated HSD tests
3,000
automated PSD tests
12,000
automated FGS tests
VERTESIS can repeat the validation process annually or after C&E revisions, PLC modifications, Management of Change or software upgrades. This maintains a repeatable evidence trail that the installed safety logic and engineering specification remain aligned.