How does a cascade control loop work

Explain the operation of cascade control loop

Cascade control Loop works 2 Transmitter For example Level & flow control In one valve.

Two control loops sharing 1 final control element. 2 sensing devices, 2 controllers, or control blocks. Both affected by the same final control device.

The output of the primary becomes the set point for the secondary controller. The secondary controller manipulates the final control element.

The secondary loop must be several times faster to respond than the primary loop for this to be beneficial