Continuous read and single write on serial port

[jwscs]

as i said  before, create a new VI, then use this VI to test the algorithm,

after you understood what it does you can put it into your "real" VI.

activate the context help (CTRL+H)

read up on all the things,

play with the things to understand what they do.

.... and keep your wires straight

[sr_murd]

Thank you very much for the help provided. I have understood the logic but the only problem is that it sends 0 rather than sending nothing when  none of the " specified times" match. im trying to resolve but if you have the suggestion, pls share.

Thanks

[sr_murd]

I think, I have found the reason, I was writing too fast for the remote device. I have put some delay and it worked fine. That makes the read slow, so I will take the write in another loop.

Thanks for your immense help

[sr_murd]

Sorry guys I am still having the same issue. Even with the wait block in the loop, still the receiving end receives 40 and 0 and sometimes 40 only at the specified time. Is there any way this can be resolved ?

[sr_murd]

Only if I use 3000ms as delay and read write in the same loop, it always sends the right value. And that also makes the read v slow, current readings reflect v delayed.

[sr_murd]

Guys please help out as Im unable to figure out why sometimes it sends both 40 and 0 and sometimes only 40 at the specified time. How can this be avoided ?

[Bob_Schor]

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@jwscs wrote:

 

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There's an interesting function in the middle of this VI that compares two Booleans, X and Y, using ">" and returns T only if X is True and Y is False.  This is exactly the negation of the (probably-rarely-used) Boolean function "Implies", which (as I remember from my class in Symbolic Logic) is True unless X is True but Y is False.  [If X is True and Y is False, then clearly "X Implies Y" must be false.  If X is False, then from a Falsehood, you can (logically) imply anything, hence X implies Y is always True if X is false).  X Implies Y can also be written (Not X) Or Y.  My personal preference is to use Logic functions for Boolean variables ...

Bob Schor