Hi Unobtanium,
Since this forum post is quite old, I would suggest creating a new post with the issue you are currently seeing as opposed to reviving this post. The following page should give you some help setting this parameter in LabVIEW:
https://www.ni.com/docs/en-US/bundle/lvdsc-api-ref/page/dialog-boxes/configure-modbus-i-o-server-dia...
Thanks,
CH
Applications Engineering
National Instruments
http://www.ni.com/en-us/support.html
