Agilent 34401A multimeter to PC with Labview driver via RS232

[GerdW]

Hi Nirmal,

start LabVIEW, create a new VI, open the BD window, right-click -> Instrument IO-> Device drivers -> Agilent 34401.

It's already delivered with your LabVIEW installation! Each function has a context help and you can examine their block diagrams…

[ashish_garg]

Hi , 

I am getting the same problem as Yulia, and as according to you I set breaking point and read it , when I give input , it is "comm1" , but the output it read as " " . How to resolve the error I m getting as  ( 

Error -1073807339 occurred at VISA Read in Agilent 34401.lvlib:Control Mode.vi->Agilent 34401.lvlib:Initialize.vi->Agilent 34401 Read Single Measurement.vi ) 

[GerdW]

Hi ashis,

two points:

- "comm1" seems wrong to me, usually the port is named "COM1"…

- you got a TimeOut error: is your device connected?, is the port setting correct?, did you send the correct command?, …

[ashish_garg]

Yes its COM1 , I am getting a time out error as well. I dont know how to check my device is connected or not ? 

[GerdW]

Hi ashish,

send a command to your device and read its answer: when the answer is "correct" the device is connected!

For identification I would choose a command to read something like device type or serial number…

[ashish_garg]

Hi I think it is not able to detect in which visa resource it is .

I made a new logical name for 34401a driver , then it worked. When I was using com1 or com6 or LPT1, it was showing error. 

can anyone know how to  shift to COM1 connectivity for 34401A DMM. 

[ashish_garg]

Dear GERD ,

I still dont understand how you are giving command through lab view or so ?

can you elaborate with steps 

Regards

Ashish

[GerdW]

Hi Ashish,

usually I use VISA functions to communicate with external devices connected over serial ports…

[ashish_garg]

I think the ivi driver was missing. By the bay when I am reading data from DMM , it reads 1 value in 1 second. how can I  increase the reading data capability by 10 data per sec from DMM and write into the file.  

[GerdW]

Hi ashish,

how can I  increase the reading data capability by 10 data per sec from DMM

Read the manual of your device (including the specs section) and then use the needed configuration settings…

and write into the file.

Use functions from the file functions palette to save data to files…

Did I mention the example VIs coming with your LabVIEW installation? There are also examples on file write/read…