Modbus protocol and NI DAQ Card

[what]

Hi,

I'm using an AC drive that supports the standard protocol Modbus RTU over RS485. I want to know if your data acquisition cards (eg. NI DAQCard-6036E for PCMCIA) are suitable to interface between this AC drive and a computer. Also, I will be using Labview to control and monitor the system.

[rgharrison]

Hi what,

If your AC drive uses the Modbus protocol over RS-485 then you will probably want to use the serial port or an RS-485 port to communicate with your AC drive from LabVIEW. I believe Lookout also comes with an OPC server which can communicate Modbus. Anyway, I suppose you could use the digital lines of the DAQ card to control your drive but it sounds like an RS-485 port (serial) would be more effective and easier than programming the DAQ board.

Anyway, hope that helps. Have a good day.

R