Visual Solutions, VisSim Overview
VisSim program can be used to simulate
some of the control problems in the
DPCL.
Review the following:
To startup VisSim, go to
START 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
Resulting Transfer
Function
Transfer function is entered by a polynomial method,
See Help for details.
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
information
Type
Steps size
End time
Go to:
>Simulate
> Simulation Properties
To Run click the green arrow!
And now you have the plot!
Change the controller tuning by drilling down
To 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.