Control Modules, Equipment Modules and Unit Modules are based on an algorithm. There are several algorithm types available:
Function Block Diagram — contains a control strategy with interconnected standard DeltaV function blocks. You define which blocks to use, their parameter values, and how they work together.
Sequential Function Chart (SFC) — contains a sequence of events with steps, transitions, and actions.
Command-Driven — contains SFC code based on commands.
State-Driven — contains SFC code based on states.
Phase (equipment and unit modules only) — contains a state transition diagram made up of embedded composites that contain the logic that governs the transition between the states of a phase. This algorithm type is typically used for batch control. The run logic for the phase typically contains user-defined actions. There are two additional algorithm types that are phases: phase algorithm with command-driven run logic and phase algorithm with state-driven run logic.