Serial communication between computer and cRIO

[Eric_Lang]

Hello,

I am not new to Labview or cRIO programming, however, am venturing into to my first trial at serial communication.  I have a controller (not of NI origin) that sends data over an RS232 serial network that I would like to log parallel to data that I am collecting with a cRIO.  Before I get to integrating, I am attempting to test communications using a serial cable, my computer and hyperterminal and the cRIO serial port.  I have followed and validated the operation and drivers with the following:

How to Do a Serial Loopback Test
https://knowledge.ni.com/KnowledgeArticleDetails?id=kA03q000000YHn8CAG&l=en-US

However, when I try to use the following example, I get nothing:

Serial Data Transfer Between cRIO and Host
https://forums.ni.com/t5/Archive-TKB/Serial-Data-Transfer-Between-cRIO-and-Host/ta-p/3521823

Any ideas on where to start?  I greatly appreciate any advice.

Thanks.

[crossrulz]

Is your cable a straight through or a NULL Modem?  I think you will need a NULL Modem cable.  That basically means the the TX on one side is tied to the RX on the other and visa versa.

[Eric_Lang · Accepted solution]

I've confirmed it is a straight through.  I will try a null modem cable.

Thanks!