Thank you for your response. I have not tried that. I am having a difficult time putting that into LabVIEW. I am using VISA configure serial, and when I put "0D0A" in as a constant for the termination character it automatically changes it to "FF". It won't let me put "[CR][LF]".
That's normal, you can only define 1 char as the termination char, not two.
I've tried messing with the termination character both in MAX and LabVIEW, but nothing is working. I feel like there are certain settings that are either configured incorrectly, or not configured at all, that is preventing the query message from being sent correctly. I can control it with hyperterminal, but when I try MAX or LabVIEW it's not sending the response message which probably means its not receiving the correct query message.
Just guessing. You messed with the termination character (singular). The sample query from the manual shows you actually need two term characters [CR][LF]. Have you tried this??
This ended up being the problem. I was able to confirm it today using the "Basic Serial Write and Read_1 bit. vi" file attached on this webpage: http://digital.ni.com/public.nsf/allkb/171D2D70CFB66E74862571390062D12B. This VI uses VISA Serial sub VIs to transmit a string to the serially connected device. It disables the termination character which allowed me to transmit "\r\n" at the end of my command inside the string which worked with my controller. Thank you all for your help.
I am also trying to use LabVIEW to control ACON and PSEP IAI controllers. It seems like you have finally designed the overall system for communication between controller and NI. Can I get the VI's that you used to communicate? It would great pleasure indeed. Thanks!