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 A Brief Guide to Building ControlDraw Models

Models can be built in several ways:-

Top Down Modelling
Stitch Together Later Model
Cut and Paste Modelling.

Top down Modelling

Start a new ControlDraw file and draw a high level process overview of the plant.

Place objects on the page that represent major processing areas within the plant. These might for example be a Building if you are modelling a large process or an area or major equipment item within the plant.

Starting the Overview:
Just use a right click to create an initial diagram

The template sets that classes of each of these objects are set to a suitable value, ie Units so we get a diagram like this (shown with Display Classes on)

Then we change the tagnames to match our process using the symbol controls

 so we now have

Adding Pages for the Units

The quick way is to select the units and use the menu in the Group toolbar


Now we have three diagrams the Process Cell containing 2 units

Now we need to add the detail to the Unit diagrams,  again we can use a right click to create a basic template that we can then change to match our process

 so we now have for he Batch Preparation Unit

There are good examples in the sample files that should give you a good idea and a structure that you can follow.

Stitch Together Later Model

Although we have described the process of creating models so far by a Top Down process, this is not the only way that it is possible to build models with ControlDraw.
Another method is to draw the lower levels first (maybe whatever you are able to obtain the information for) and then add the overview and hierarchy later by assigning child pages to objects.

You can make a single object into the parent of a page in the symbol design form by selecting from the drop down the list next to the child button. This is however a very slow process and, of course, ControlDraw provides a much faster one. This is available by choosing a Tools Apply child from the main menu. When you select Tools apply child, a list of all the pages in the model appears floating above the page. You can then click on the page in the list of pages and then on the objects on the drawing screen, and immediately apply that child number to the object of you click on.

An even more power method is also available, because when you select a multiple objects on page and then use Tools apply child all of the selected objects will be given that child number. This is most useful in the case of the things like valves or motors and those things of which they are many on one page. For example if all of the valves on a page are numbered XVxxx you can use Ctrl-F to select all the objects that have XV in their text and then tools apply child to make them all parents of a Valve driver page.

Cut and paste or import modelling.

For experienced users of ControlDraw one of the most powerful features is that you can re-use considerable parts of other models in order to make the process of building your model very much quicker than it would be if you were starting from scratch. For example, at the simplest level, you can re- use valve driver and motor driver diagrams. At the more advanced level, you can take entire process units or even process cells from another model to import these into a new model.
Look-up "Import Diagrams" in the manual for further details on this. And in fact a better way is to use a Reference Model

ControlDraw Main Features