Looking for Drivers for InstruTech IGM_402 Vacuum Gauge

[Roese]

Does anybody know where I might find some driver VIs already developed for InstruTech Vacuum Gauges?  Specifically, the IGM-402.

[BB.]

Hi Roese,

My name is Ben, i am an Applications Engineer at National Instuments.

Having had a look online at your device i have searched our third party instruments driver page, which can be found at ni.com/downloads/idnet. Your particular device isnt listed however this page has useful links on how to create your own drivers using NI-VISA. What bus does your instrument use?

Kind Regards,

[Roese]

RS-485 & communication is in Modbus format.

[BB.]

Hi Roese,

Are you connecting your instrument directly to a computer, either by RS-485 or RS-485 to USB? I have found some information on using Modbus with LabVIEW, including a tutorial , and a Modbus Library for use with LabVIEW. These modbus library functions integrate directly with NI-VISA.

Hope this is provides you with some helpful information.

Regards,

[Jrsmith02]

Sorry to be six years late in responding, but the students and professors in our lab at Cal State Fullerton, using the InstruTech manual to get the communications commands, just posted this set of example VI programs. Perhaps you or others still have a use for these. 
http://forums.ni.com/t5/Example-Program-Drafts/InstruTech-Hornet-402-Vacuum-Gauge-Control-VI/ta-p/36...
Josh

[Roese]

Thanks for the link, but it takes me to a "Document not Found" page

[Jrsmith02]

I'm sorry, after uploading that as an example program draft it seemed to take a longer than expected amount of time before the link worked for anyone but me. Now it seems to be up. Does it work for you? 

https://forums.ni.com/t5/Example-Program-Drafts/InstruTech-Hornet-402-Vacuum-Gauge-Control-VI/ta-p/3...

[Hansel]

Did you use RS485 2-wire or RS485 4-wire for this?  Also, were 120 ohm termination resistors needed?