Can't get modbus library to communicate with Modbus RS 485 device

[simplemaan]

The Modbus Library for LabVIEW can communicate to many different devices, but for this particular style of temperature/process controller, you may want to check out this library, which supports this and other similar controllers:

http://integratedpro.com/content/?page_id=41

[ashish-singh]

Hey Ravens Fans, 

I have a temperature controller Omega CN 7500. I found the following link which uses labview to talk to the controller.

http://forums.ni.com/t5/LabVIEW/Can-t-get-modbus-library-to-communicate-with-Modbus-RS-485/td-p/8097...

I am very new to all this. so dont have much clue about how things work .When I run the Vi, it is generating an error message "Error 6101 occurred at Timeout Error".  i changed to RTU mode and put for eg. 98 for the address in the starting address of the modbus command(inside the  while loop). but still getting the same errror message. 

Can you help guide the way for communicating with these controllers using labview? do you have any manual/application note for modbus communication with a temperature controller. Ni has some information, but that is not enough.

[ashish-singh]

Thanks simplemaan.

I will definately look for that library. in the mean time, do you think I need a driver for this controller to talk to labview?