Control Loop Foundationcontrolloopfoundation.com/downloads/about-the-book/Chapter13-Multi... · Copyright © 2010 by ISA Valve Position Control. Copyright © 2010 by ISA Valve Position

Copyright © 2010 by ISA

Multi-loop Control - Feedforward Control


Feedforward Control Implementation


Commissioning Dynamic Compensation


Workshop – Feedforward Control


Cascade Control


Example – Boiler Steam Temperature


Cascade Control Implementation

Selecting

FRSI_OPT for

dynamic reset in

primary loop and

CONTROL_OPTS

for Use PV for

BKCAL_OUT in

secondary loop

can often improve

dynamic

response.


Workshop – Cascade Control


Override Control


Example – Override Control


Override Control Implementation


Workshop – Override Control


Control Using Two Manipulated Parameters

Three methods

Addressed:

Split Range

Control

Valve Position

Control

Ratio Control


Split Range Control Implementation


Split Range Setup


BA

Example – Split Range Control


Workshop – Split Range Control


Valve Position Control


Valve Position Control Implementation


Example – Valve Position Control


Workshop – Valve Position Control


Ratio Control


Ratio Control Implementation


Example – Ratio Control

In this example

the ratio setpoint

is adjusted using

feedback control

based on a

downstream

analysis of the

blended material


Workshop – Ratio Control


Process Simulation for Ratio Workshop

Documents

Control Loop Foundationcontrolloopfoundation.com/downloads/about-the-book/Chapter13-Multi... · Copyright © 2010 by ISA Valve Position Control. Copyright © 2010 by ISA Valve Position