Emerson Exchange 365

Checklist for Cascade Control

Cascade control is an effective way of providing better feedback and feedforward control. The peak error in the primary loop can be reduced by more than an order of magnitude for disturbances originating in the secondary loop. The nonlinearity a control valve can be removed from the primary control loop. Flow feedforward and ratio control can become more effective. The following checklist provides some guidance on how to get this and more from cascade control.

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