I need an VI for a very special RS232-communication (own timing)

[ap_user]

I need an VI for a very special RS232-communication (own timing)

I will answer to 4 received bytes
Then I will send 5 bytes
The answer-time is above 1ms
I must send the 5 bytes by oneself because I need a inter-byte time above 1-2ms
I will send the bit with 9600bits/s

So my question, have anyone a VI so I can adjust my own timing on the COM-port?
The NI-VIs for COM-communication are not fast enough.

[jcrooke]

I have enclosed a simple state machine that does what you asked.  It is an example of a standard LV programming structure.  Review it.  I have found that it is useful for most of my programming tasks. 

Normally, you would make the enum used as the state indicator a defined type.  To do this you would customize the control and select "type def." in the control-type pulldown menu.  Doing this greatly simplifies adding and deleting states.   

[Henrik_Volkers]

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I will answer to 4 received bytes
Then I will send 5 bytes
The answer-time is above 1ms
[....]´

The NI-VIs for COM-communication are not fast enough.

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???????

I asume you need a max answer time of 1ms.

If you use Windows try this: To meet the timing the FIFO-buffer of the serial interface must be deactivated.

The settings of the serial interface have to be configured in the system control.