You can create algorithms for your modules in the DeltaV system using one of the following command languages:
Function Block Diagrams (FBDs) - typically used for analog control, monitoring, motor control, and discrete valve control
Sequential Function Charts (SFCs) - typically used for time-variant sequencing
Structured Text (ST) - used within DeltaV software to create expressions in the condition, action, and calc/logic function blocks as well as in actions and transitions in SFCs.