Error at Configure Serial Port at Property Node(arg 17)

[hansgeorg]

Dear all,

i try to connect with an old temperature measurement device. I use an USB-RS232 Apdater.

I was able to read out the temperatures with the Visa Test Panel from the NI Max, after i tried several different settings.

So i tried to copy the attributes from the NI Max and set them also in the Configure Serial Port.vi

In the end i have a problem with the Property Node(arg 17). This is the setting in the NI Max:

Here are the settings in the Labview.vi ; the numbers of the property node i hope are right?!Her

Here you can see the error in the Labview program. 

I tried also the other possible settings at arg 17 but i always get this error code.

Can someone help me with that? Why there are this differences in VISA test panel and Labview?

Best regards

[pincpanter]

You are setting too much properties. Use the VISA Configure Serial Port.vi.

I never needed anything else in the last 14 years.

[hansgeorg]

Hi Paolo,

thank you for you reply. At the beginning i was trying it like your propose; in Labview and also in VISA test panel. 

Read out was in both programs not possible, but i got no error with VISA Configure Serial Port.vi

I got this device with a short description:

.BaudRate = 2400

                .Parity = IO.Ports.Parity.None

                .DataBits = 8

                .StopBits = IO.Ports.StopBits.Two

                .DtrEnable = False                          ' PIN 20 = -12V, DTR (PIN 4 SUB-D9)

                .RtsEnable = True                           ' PIN  4 = +12V, RTS (PIN 7 SUB-D9)

                .Handshake = IO.Ports.Handshake.XOnXOff

                .WriteTimeout = 2000

                .ReadTimeout = 2000

It is important to set DtrEnable and RtsEnable right.

The original communication with this device was done with visual studios.

So i think i have to set more properties to be able to talk with the device....

[RavensFan · Accepted solution]

Then use the properties to set the DTR and RTS states.  But don't set all of them.  Apparently your serial port doesn't like the RS-232/DTE setting, so you should definitely NOT try to set that property.

[hansgeorg]

You are right... i was only pulling out arg for arg of the property node and not setting the args which i needed.

Now i set it right and read out is working well.

Thank you for your help!