DELTA V DCS EMERSON - DeltaV Programming presented : FBD, SFC & Structured Text in 5 Minutes

https://hdhosseini.com/course/emerson_deltav_basics/ Emerson DeltaV uses several IEC-61131–style languages, with the core programming done in Function Block Diagram (FBD). Most control strategies—PID loops, logic, interlocks, and advanced control—are built by linking standardized function blocks graphically. For sequential operations such as batch phases and step logic, DeltaV uses Sequential Function Chart (SFC), which provides a clear step-transition structure for procedures. DeltaV also supports a script-like language through its CALC (Calculation) blocks, which use a Structured Text–style syntax for arithmetic, comparisons, and logical operations. This provides greater flexibility when FBD alone is not enough. Together, FBD, SFC, and Structured Text within CALC blocks form the primary programming toolkit inside DeltaV.