Visual Solutions, VisSim Overview

VisSim program can be used to simulatesome of the control problems in the DPCL.

Review the following:

Shortcut to Visual Solutions.doc.lnk

To startup VisSim, go toSTART menu VisSim 3.0

VisSim Menus

Once the program is running, the toolbar will allow the user to configure the function blocks;>Blocks > Linear System >Transfer function

Transfer function is entered by a polynomial method,See Help for details.

Resulting TransferFunction

VisSim allows you to “group” function blocks. Highlight

the block and edit it as a Compound Block.

Resulting compound block

PI and PID controller blocks are available in the VisSim folder under the DeltaV data. You can open these files and copy and paste the controller blocks when required.You might find it useful to check out the way these blocks are written.

To wire the blocks, just left click the mouse, same way you soft wire Simulink or other programs.

Now we have a PI controller and a transfer function block wired!

Now we need to add the feedback loop and a set point. The set point can be a constant. The arrow block can be used to wire in an organized manor.To drill down to the controller just click it!

arrow

constant

Add a trend Plot and wire it up!

Now we need to enter the integrator informationTypeSteps sizeEnd time

Go to: >Simulate > Simulation Properties

To Run click the green arrow!And now you have the plot!Change the controller tuning by drilling downTo the controller block!

Added Reset to the same controller yields:

You can save this file if you wish.

Try creating some simulations on your own. Become familiar with the program, we will be using it from time to time.