invertek and modbus

[cpalka]

Hi people 

Sorry for almost duplicate, but here I use a visa com port to comunicate with drive

http://forums.ni.com/t5/Industrial-Communications/invertek-drive-modbus-communication/m-p/3308419/hi...

But starts to come complicate to translate the string to decimal numbers.

So there must be a Modbus example that we can input register numbers to get data from driver.

In attach there is a png that tell me the data format to send, a vi that works (with precious hel of Kees) with visa and the modbus drive manual.

So could you please tell me if a modbus (i ha installed the add in)  works easier than my example. The problem is there some register numbers could be for read or write deppends if we use a 03 or 06 before.

I am sorry if I duplicate post but I need to get data from drive to start a research and of course my academic knowledge is not enought to understand bytes and bits as the manual explain.

Best

cpalka

[K C]

Have a look at the display option of the data in my VI. The data is presented in HEX

You must understand that you are sending a string. The way how this data of that string is presented does not change the data.

Kees

[Dasso]

Hello,

The interaction between LabVIEW and modbus is well documented on NI community, find those two samples :

1) http://forums.ni.com/t5/Instrument-Control-GPIB-Serial/MODBUS-RTU-multiple-write-amp-read-NI-VISA/td...

2) https://decibel.ni.com/content/thread/21786

And NI provide also some good tips : https://decibel.ni.com/content/docs/DOC-30140

Best regards,

Dasso

[cpalka]

Many Thanks Dasso

Seems that is what I mean.

Tomorrow I will give news.

Best

cpalka