Cascade Loop Trainer — Level over Flow

Level controller (master) sets the setpoint of the flow controller (slave)
Sim time: 0.0 s  ·  AUTO

Process

Flow into tank Tank outflow (load) Cascade signal

Level trend (master)

Level SP Level (PV) Level controller output

Flow trend (slave)

Flow SP Flow (PV, noisy) Valve (CO)

Flow controller mode

Supply-pressure disturbance

Why pressure? For the same valve opening, higher supply pressure pushes more flow through the valve (lower pressure, less). So the flow changes even though nobody touched the valve — that is the disturbance.
Time since last hit— Peak level deviation— Peak flow deviation—

Simulation

Instructions