I am trying to configure an NI 9871 4-port 485 serial module for half-duplex communication with no-echo. My problem is I can't figure out how to select the transceiver mode. Table 3 of the manual (http://www.ni.com/pdf/manuals/372277e.pdf) shows four different modes but it's a mystery to me how I configure the mode. The module is currently in 4-wire mode where the receiver is always active (if I tie TX & RX lines together, I get back what I send.) I would like to be in 2-wire Auto mode. Can anyone point me in the right direction?
BTW: I'm using a cRIO-9075 in scan mode and using Labview 2012 SP1 (windows), In case that matters.
Thanks.