increasing value in stateflow

hi all

i want to make condition STATEFLOW, like:

*V=10 X=1 Z=20

if S>=5 && S<=10

then Value V repeatly increase by the value of X until its reach value Z.

so, the value V later could be= 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 then go to next state after reach value Z=20.*

how we did it in stateflow??

thanks

Answer 1

[Gerd]

Hi Luhur,

assume you have 2 states. One is called increment the other is called nothing. With your S variable checked in a transition you can choose where to go.

Assume S satisfies the criteria and you are right now in state increment. In this state you can write EN:V = V + X; So everytime you enter this state V is incremented by X. From the state increment you can check in a transition if V>=Z and go to the next step.

If you are in state nothing you don't have to do anything just go back and check S again.

Gerd

[Luhur]

didnt work gerd. it was only added once. after that the state just turning around. the value in simulink stay still.

[Gerd]

with the ev: statment you perform execution everytime you enter the state. Therefor you entered the state just once. Can you upload somewhere a screenshot to support you better.

[Luhur]

the key is make a function in local stateflow to save data for a while. THANKS GERD!!!

[Antony Smith]

I thought it would be this simple but I am getting a very irritating error:

The data signal was read before being written to.

This error will stop the simulation. State 'variable_1' in Chart 'sens_mtr/Motor Controller/Chart':

signal = signal + 20;

The variable was already given an initial value in a previous block before reacing this block? Any ideas of what causes this?