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NI-VISA Return an Incorrect Wire Mode Value for RS-232 Ports on Linux RT

Updated Oct 1, 2018

Reported In

Hardware

  • RS-485
  • RS-232

Software

  • LabVIEW
  • LabVIEW Real-Time Module

Driver

  • NI-VISA

Operating System

  • NI Linux Real-Time

Issue Details

I am using a VISA Property Node in LabVIEW to read the Wire Mode of my RS-232 serial port on a Linux RT target. However, this property indicates this port is an RS-485 port while I know it is an RS-232 port. How can I resolve this issue?

Solution

This is a known issue when using LabVIEW Real-Time 2015 with NI-VISA 14.0.1 and earlier. As mentioned in the NI-VISA readme, this software combination is unsupported. In order to resolve this issue, please upgrade to NI-VISA 15.0 or later.

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