Serial communication from NMITerm to LabView

[dannyjhu]

I have a Resonance Instruments microwave that I'm trying to control through serial interface using LabView.  I have controlled other serial devices for testing using the basic serial write and read vi example and I can control the microwave using NMITerm terminal I received from Resonance.  But for some reason I can't get the microwave to communication with LabView.

The microwave uses the standard settings of 9600 baud rate, 8 data bits, No parity, 1 stop bit and no flow control.  Using the NMITerm I can enter the example string of "T005P025O", where T is for time, 005 is five seconds, P is for setting the power, 025 is the requested watts and O starts the microwave.  The string does not require a carriage return to start.  As soon as I typed "O" the microwave begins heating.  I can also type the letter "R" to get the current microwave settings, again no carriage return is required.  Type R and up comes the settings.

I have attached a screen capture of the terminal page. 

I can't figure out what I'm missing  in LabView or the basic serial write and Read VI.  I have tried sending the string with and without the preceeding "/" and with a number of different suffix combinations including "O\n", "O\r\n" with no luck.

Is there a specific setting I need to change for the string ending in "O" instead R for the standard carriage return?  Or am I missing another setting?

Thanks for the help.

[Wayne.C]

Danny,

Post your code so someone can take a peek.

Also suggest that you fire up NISpy and log the actual data that the NMITerm program is sending to the instrument.

Message Edited by Wayne.C on 06-16-2009 11:18 AM

[Coq_Rouge]

If you are using '\' codes your control\constant must be set in that modus. Right click on the string item and select '\' codes display

[dannyjhu]

Wayne,  I'm using the basic serial write and read example from LabView examples.  I have attached it for you.

Coq rouge, the example program has the "\" code aready set. 

On the terminal program it doesn't require a "\".  If the terminal program doesn't need the "\"  does that mean I don't need it in LabView?

Thanks for the help.

[Dennis_Knutson]

The terminal program may be doing it for you as you type.

Message Edited by Dennis Knutson on 06-16-2009 10:34 AM

[Coq_Rouge]

Sorry I was somewhat slow. Your NMITerm is a dedicated program, not some hyperterm tool. So I guess you have to do some spying. Or perhaps much more easy. Ask the vendor if they can send you the communication protocol, for your instrument