Solution
NI VeriStand implementation doesn't provide any configurable access to RS232/422. However, you can create your own Custom Device (CD) or work with the existing
Instrument Add-on Custom Device to extend the NI Veristand Framework to address this functionality.
Although VeriStand provides most of the general functionality required by a real-time testing application, NI has designed the environment so that you can customize and extend it when necessary to ensure it always meets your application requirements. NI VeriStand custom devices are created with NI LabVIEW software using a template library installed with NI VeriStand that includes interfaces to the NI VeriStand data and timing resources.