Communication with the ContronTechniques Unidrive

[pascal.obst@halm.info]

Communication with the ContronTechniques “Unidrive” frequency converter

I want to control the ContronTechniques “Unidrive SP” frequency converter via LabVIEW. The coverter is connectet by ethernet with the SM-Option module called “SM-Ethernet“. An ingineer from ControlTechniques said it should work with the modbus protocol TCP/IP. Anyone know of LabVIEW driver for the converter or any infos to programming the driver. Follow the link to the manual (Manuals-Products-SM Options-SM Ethernet and Manuals-Products-AC Drives-Unidrive SP-User Guide and Advanced User Guide).

http://www.controltechniques.com/downloads/manuals/manuals_frame.htm?manuals.asp&mainFrame

[JamesC]

Hi Pascal,

You could try the Modbus LabVIEW Library. This is a bit buggy as can be seen by the comments on the download page, but should give you a big boost in creating code to program your instrument.

Hope this helps you.

Regards
JamesC
NIUK and Ireland

[unclebump]

This thread has an example to read holding registers over ethernet.

https://forums.ni.com/t5/LabVIEW/Modbus-examples/m-p/249832/page/2?view=by_date_ascending

[Wayne.C]

Look at the Labview DSC add-on module.  Not cheap but it makes modbus communication very simple.  Three steps:

1 - Create and configure a modbus server for either TCPIP or serial communication.

2 - Create and configure shared network variables that are bound to the Modbus Server.  Each variable is configured to points to a particular register or bit in a register.

3 - Place the shared variables in your vi and simply read or write to them.