08-31-2010 05:47 AM
08-31-2010 08:42 AM
For the most part the primary difference between using the VISA serial drivers for RS232 and RS485 is in the actual hardware connections. The wiring between RS232 devices is different from that of RS485. There is the issue of "addressing" the units (485 allows more than one unit on the "bus" with the protocol sending an address before the actual data). Do you have the correct cables between the 485 interfaces? Also do a search for 485 protocol on this forum or on the general NI one. There is also an example in the LabVIEW help pull down NI RS-485 Transceiver Control, search on "serial"
09-03-2010 02:43 AM
09-03-2010 05:15 AM
09-03-2010 05:27 AM