Additionally, we have the following Knowledge Base article on the subject: <a href="http://digital.ni.com/public.nsf/websearch/2CD034F223C650E9862569570041995C?OpenDocumen";>Do LabVIEW and LabVIEW Real-Time Support Modbus?</a>
You might be able to sidestep doing any modbus programming by using an itermediary OPC server that can perform the modbus communication for you. Also, there is an NI alliance member that has a LabVIEW library for modbus support. -Russell Applications Engineer National Instruments http://www.ni.com/support
