09-20-2010 09:18 AM
Hi,
I have the following problem which I would be grateful for any help to solve.
I have a digital meter device (lumel NA5) which has RS485 interface, and modbus protocol over it.
A possible solution I'm contemplating is to get a RS485 to USB converter, and then talk to the device from Labview.
I found Labview library for serial and TCP/IP modbus. But is it possible to connect to this device using UCB?
Thanks,
Eyal.
09-21-2010 02:13 PM - last edited on 03-09-2024 04:15 PM by Content Cleaner
You can use this
or if you need more ports...
With this device the serial ports will show up like any other COM port, you can target it in LabVIEW or third party software.
09-22-2010 02:17 AM
Hi,
I use USB-uarts from FTDI. Place it on a small PCB add a RS-485 transceiver. With this you have a RS-485 interface as a normal COM port.
You can also buy complete USB-RS-485 interface. No experience with those but I am sure that most of them just works fine if you need a 'standard' communication.
10-03-2010 02:54 AM
Hi,
Thank you very much, I'll check it out.
All the best,
Eyal.
03-06-2012 04:11 AM
Salve a tutti,
vorrei sottoporvi una questione: avendo realizzato un convertitore usb-RS485 fatto in casa, MAX può riconoscerla come porta seriale?
braxat2000 ha scritto:
Hi,
I have the following problem which I would be grateful for any help to solve.
I have a digital meter device (lumel NA5) which has RS485 interface, and modbus protocol over it.
A possible solution I'm contemplating is to get a RS485 to USB converter, and then talk to the device from Labview.
I found Labview library for serial and TCP/IP modbus. But is it possible to connect to this device using UCB?
Thanks,
Eyal.
03-07-2012 09:01 AM - last edited on 03-09-2024 04:15 PM by Content Cleaner
MAX will probably not be able to recognize your USB-RS485 converter. It's possible that it would work - the best way to find out is to try.
But if you want to use National Instruments software you should probably just purchase one of the converters linked above (such as https://www.ni.com/en-us/shop/model/usb-485.html).
03-07-2012 09:10 AM
Since the earlier mentioned FTDI devices acts like a normal COM port it will be recognized by MAX.
I use them a lot. Works perfectly.
If you want a solution that works without adding an interface circuit follow the link of Colden R
If you can solder and are able to add a RS-485 interface circuit to the FTDI device follow my solution.
There is a price difference