05-08-2015 07:55 AM
Hi guys, so I trying to read some data of a meter ( Mult-K kron ), from the rs 485. I haven used the software of kron, and its works. But now I want read the same data on LabView and I cant read nothing. Sorry, I new on this. If somebody can help.
Best regards !
Solved! Go to Solution.
05-11-2015 01:52 AM
Hi,
If the SW of Kron works OK you know that the hardware link.
Tell us what you used in LabVIEW. What is the protocol of the meter ?
Kees
05-11-2015 06:20 AM - edited 05-11-2015 06:48 AM
Hi, tks by the answer. The protocol is modbus RTU (rs-485).
I trying use this:
And I used a converter rs485 to USB.
05-11-2015 07:28 AM
You don't write anything. If you want data from a ModBus slave you first have to write data.
Why don't you use the ModBus Library from NI ?
05-11-2015 08:10 AM
Hi, sorry about that. So I change to MB lib.
e use this :
About write, how I know what I need write to receive the correct data ? I trying to search this in the manual, but I dont find nothing. Sorry, is the first time I'm doing this.
05-11-2015 09:22 AM
Hi,
Try to use the examples available in Modbus Library, and read a tutorial about Modbus in LabVIEW.
ModBus Protocol Reference Guide
http://www.ni.com/white-paper/52204/en/
Modbus Library
http://www.ni.com/example/29756/en/
I hope it can help you.