Using LabVIEW to control Lakeshore 350 Temperature Controller - Set Point and Ramp

[MEIRITAY]

 Hello 

I am using LabVIEW (2016) to control Lakeshore 350 with the software that available on NI site, to do temperature dependence of PL spectra. 

Most of the VIs works, but the "Configure Setpoint and Ramp" VI don't works (error 1073807339).  

I checked that the device is on remote mode. 

I can turn the heater on and off but can't control the Ramp and the Set point . 

Do you have any idea what could be the problem?

thanks 

Itay   

[GerdW]

Hi HUPHYUPH,

you probably get error -1073807339 (=0xBFFF0015), which is a typical TIMEOUT error: your device doesn't answer for a request (or doesn't send any data at all).

For more help you should attach your VI.

You can also read the programming manual of your device and debug the subVIs handling those setpoint and ramp commands. Sometimes there are bugs in the device drivers from IDNet…

[MEIRITAY]

Tanks GerdW

I downloaded the VI from NI site:

http://sine.ni.com/apps/utf8/niid_web_display.download_page?p_id_guid=E074A9BA0D744FD7E0440021287E6A...

Thanks 

Itay  

[GerdW]

Hi Itay,

can you attach that VI?

[MEIRITAY]

this is the VI ( and the subVI) 

[GerdW]

Hi Itay,

thanks for upload. I justed wanted to check the display mode of the string constant - you never know…

I would rewrite the VI as such:

Where exactly does the TIMEOUT error occur?

Which interface are you using? (I guess it's a serial port!?)

[MEIRITAY]

thanks GerdW

I am using USB

the error is in the subVI in the "VISA read "

[GerdW]

Hi Itay,

so the error is generated in the error handling routine???

Does the device need that StatusByteQuery after setting setpoint and ramp? Does the device work as requested when you filter that error?

Is it really an "USB" connection or just a virtual COM port?

[MEIRITAY]

Hi GerdW

Yes the error is generated there.

Its not working with or without it. 

Its a regular USB connection.

Thanks 

Itay