07-02-2013 01:13 PM
I am trying to setup a USB-RS485 device as per this knowledge base document:
http://digital.ni.com/public.nsf/allkb/1D516C10D7EDFAC6862571110073B8F4
However all of the Advanced options under the serial com port are grayed out and changing the transceiver mode from 4 wire to 2 wire is not possible. How can I enable these?
Thanks.
Solved! Go to Solution.
07-07-2013 07:04 PM
Hi ah.bic,
Are you using a serial card or your machine's built in serial ports? Have you confirmed that these ports are configured correctly (IDN command, loopback test, etc)? Finally, what version of the NI-Serial drivers are you currently using? You should update to the latest NI-Serial drivers if you haven't already.
I hope this helps!
Andy C.
Applications Engineering
National Instruments
07-09-2013 11:59 PM
On Windows Vista and later, these settings can only be modified by running MAX as Administrator. Just right-click on the icon, and choose "Run as Administrator", and everything should be available to you.
07-10-2013 12:40 PM - edited 07-10-2013 12:41 PM
Andy, Jason,
The device is a National Instruments USB to RS485/422 interface cable (http://sine.ni.com/nips/cds/view/p/lang/en/nid/12845). Jason's solution of running NI MAX as admin provided access to the settings.
Many thanks.
Al