Hi Just,

Thanks. Can you provide a very simple yet complete example (as a mo-file) which I can open and modify? Say the formula to be represented is y = a*u + b where a and b are parameters with values 1 and 2 respectively, and u comes from a step input block.

(By now, I am not mastering Modelica programming. My present skills is to create block diagrams representing mathematical block diagrams of systems given as given diff eqs and PID control for these systems.)

Regards,
Finn

In block diagram simulators, is there a block in which one can write textual math, like the Formula Node (with C-code) in LabVIEW and the Matlab Function (with Matlab code) in Simulink? Such blocks could be used as an alternative to using elementary math blocks, thereby simplifying the block diagram considerably.