How to transfer data between the different states in "state machine"?

[robbieyang]

I want to transfer some data from one state to another. I tried the tunnel, but it can't work since it's the case structure. Does "state machince" support data transfer? Or any other methods I can do?

Thank you.

[altenbach]

Typically, you would keep your data in a shift register so it is avalable in all states.

[jon_mcbee]

Are you using the State Diagram Editor toolkit, the State Chart or a state machine of your own?

Cheers!

[robbieyang]

Yes, I am using State Diagram Editor toolkit.

[jon_mcbee]

altenbach nailed it on the head, keeping the data you want to pass in a shift register is the way to go. 

Cheers!

[robbieyang]

Do you mean to add a shift register on the outer while-loop? I tried that but still didn't work.

[jon_mcbee]

Yes, adding a shift register to the outer while loop should work, make sure to initialize it.  Perhaps you could attach your vi so we could have a look at it.  Be sure to give us as much info as to what your goal for the vi is.

Cheers!

[robbieyang]

It can work. But what I want is some data only used in certain states not all the states.
If I used the shift register, I need to wire the registers in all states.

[jon_mcbee]

That is true, but you dont have to access the data from the shift register in every state, you can simply pass it through.  It may be a hassle to do the extra wiring but it will be your best solution.

Cheers

[robbieyang]

well, Thank you very much!