- May 6, 2025The V-Model is a software dev approach where testing mirrors each design phase. It’s referenced in IEC 61508-3.
- May 6, 2025Smart Logic Modules are safety-rated processors with advanced diagnostics. They often form the logic solver in a SIS.
- May 6, 2025SITs ensure the logic, wiring, instrumentation, and safety systems work together properly once installed. Often overlaps with SAT.
- May 6, 2025A Safety PLC is a programmable logic controller certified to perform Safety Instrumented Functions (SIFs) in compliance with SIL requirements.…
- May 5, 2025The main interlock list (MIL) defines what trips what. It shows conditions that trigger safety actions across interlocks and shutdown…
- May 5, 2025Logic Diagrams visualize how inputs and logic conditions result in safety actions—often using FBD or ladder logic.
- May 5, 2025A Functional Narrative is a written explanation of how a system operates in all conditions—used alongside MILs and logic diagrams.
- May 5, 2025Fixed Programming Languages (FPLs) like Ladder Diagram or Function Block are limited, structured languages used to reduce programming errors in…
- May 5, 2025FVLs like structured text offer more freedom than FPLs but increase the risk of introducing systematic faults.
- April 29, 2025An Application Program is the custom logic inside a Safety PLC or logic solver that executes SIFs based on sensor…