Need something to draw high level system (block) diagrams

[Mosey]

I need to draw high level system (block) diagrams, such as for a control system. I want to be able to create "blocks" that I can control the size of, with block names and input/output terminals. It would really be nice if the terminals could be connected with "wires" (like in a schematic capture or LabView) so if a block is moved the wires stay connected and automatically re-route. I have drawn block diagrams in OrCAD and it's OK, but doesn't have the "wires" feature, I have to draw lines and if I move something I have to re-route the lines. I've looked at AutoCAD Electrical and Multisim, but neither seem to have what I'm looking for. In OrCAD and Multisim, I can create components, but they are limited to certain pin numbers and the block sizes are fixed. For example, I may want a block that has 4 inputs and 2 outputs, but any component I create will have the same number of inputs and outputs and I can't control how the pins are numbered. It would also be nice to be able to hierarchially enter each block and add the details of the block. Is what I'm looking for making any sense? I have a feeling what I'm looking for doesn' exist, but it doesn't hurt to ask.

[Tien_P]

Hi Mosey,

You should be able to do a block diagram in Multisim.  Follow these steps as an example: 

1.  Place any component from the database on the work area

2.  Select the menu Place>>Connectors>> HB/SC connector

3.  Connect the component with the connector

4.  Double click on the connect and rename the Refdes if you like

5.  using your mouse create a window around the components to select everything

6.  Select Place>>Replace by Subcircuit, type a name for the subcircuit

7.  Now, you have a block on the work area with one pin

8.  If you don't like the symbol, right click on it and then select "Edit symbol/Title block" on the pop menu

9.  In the symbol you can do whatever you want with this symbol

  

Message Edited by Tien P on 03-31-2009 12:54 PM

[yyao]

There is a sample project, FerromagneticMaterialDetectorProject.mp10, in the Advanced folder which is installed with the Multisim samples. This project demonstrates the use of hierarchical design pretty nicely.

[rajeevs]

Hello Mosey,

         We are a small startup design service company focussing on high level system design. We have developed an application that allows designers to draw a block diagram of their design, interactively move, floorplan and route the signals and then output DEF and Verilog files that match the block diagram drawn.

         If you are interested to see if these capabilities address your need, please let us know, we will be happy to share our technology with you.

Please contact me at your earliest convenience.

408-986-8290