Help with serial communication

[JarmerFohn]

I'm using putty to make a serial connection to an rs232 power supply.  Everything works fine...  But when I try to use the labview serial comm examples (serial.lvproj) I have no communication and I get a timeout error.  There aren't that many parameters to make the serial connection so I dont know why one works and the other doesnt.  

The NI max VISA test panel also doesnt work, which is no surprise if the serial VI doesn't.  But what am I missing here?  The VISA test panel has a few more parameters than putty specifies like, buffer size, hardware control, termination methods but I'm not sure what those should be.

Any help appreciated.

[crossrulz]

What power supply are you trying to communicate with?

The other possible issue is if you still have the port open in Putty when you try to open it with MAX or LabVIEW.

[Eric1977]

To Corssrulz's point, you may want to also consider restarting the PC. I've found, from time to time, that the port doesn't always close completely and a restart is needed if you're using some other software to test the COM port like you describe.

[RTSLVU]

I also suggest you watch this video: VIWeek 2020/Proper way to communicate over serial

As the serial communication examples that come with LabVIEW are just wrong on so many levels...

[ooth]

Make sure you have Putty closed when you try to communicate using MAX or LabVIEW. Only one program can use the port at a time.

[MaSta]

You might be missing a termination character which, in regard of the I/O tool and the VISA serial resource properties, isn't activated by default.