if you are communication via RS232(485): there has been a vi for euro. controllers since LV 3.1 that does the the job (or is a good starting point) in the info-labview vi collection.
another is the modbus.llb here is some info about it: VI let you communicatie via a serial inerface with Modbus instruments. PS. No error checking is done in this version; Error clusters only implemented for future use - Users might implement this for their own needs... This VI is referenced to the Modicon Modbus Protocol as described in the Modicon Modbus Protocol Reference Guide PI-MBUS-300 rev. D This VI is only tested with a Eurotherm T103 unit controller but should alse work with any other Modbus Instrument. Maarten van Bree AIR technical automation, the Netherlands [<< email adresses deleted just to prevent the author of the vi from spam>>] http://www.air.nl
