UDC 3000 Communication Problem

[AATEE]

I have read on the forums about many success stories with communication from Labview VISA to the Honeywell UDC series.

I'm using Labview to communicate to the UDC3000.

I have used serveral expamples aquired from the forums and also written some. But I had no communication between NI-VISA and Labivew.

I've used the NI Trace, and see the message leave on the Com port, but it VISA is not able to read anything back from the controller.

I am using a USB-485 converter bout from NI.

Can someone help provide me with Labview setup instructions to be able to establish communications?

Also, if anyone has in tips in wiring up the USB-485 to UDC3000, please advise also. Can the USB-485 be used to establish communications or do I need to obtain a black box?

Thanks, Anything will help.

[Esteban_B]

Hi AATEE,

Based on your description I think that the problem may be related to the communication parameters between your computer and device, to you have the baud rate, parity and bits set as the device needs them to be set.

If you open Measurement and Automation Explorer and you open a test panel for your device, can you get any response back from it? You can try to use a VISA example VI to talk to the instrument too.

Regards,