PLCspråkene
PLCspråkene refers to the set of programming languages defined for programmable logic controllers (PLCs) within industrial automation. The IEC 61131-3 standard provides a framework for programming PLCs and specifies five languages intended to cover a range of tasks, from simple relay-style logic to complex algorithms. The standard aims to improve portability of programs across different PLC platforms and to accommodate engineers with varying backgrounds.
Ladder Diagram (LD) is a graphical language that resembles electrical relay logic, using rungs and symbols such
Function Block Diagram (FBD) is also graphical, constructing programs from interconnected blocks that perform specific functions.
Structured Text (ST) is a high-level textual language similar to Pascal or Ada. It supports complex data
Instruction List (IL) is a low-level, assembly-like textual language that expresses operations as a sequence of
Sequential Function Chart (SFC) provides a graphical method for structuring a process as steps, transitions, and
Together, these languages offer a spectrum of notation and abstraction levels, allowing engineers to select the