Dear Sir/Mam I want to implement Modbus protocol over RS-232 for my sbRIO board

[AJAYY06]

I want to implement Modbus protocol over RS-232 for my SBrio board. is it possible and how ?

[AJAYY06]

in sbrio 9638 can i use modbus communication, if it's possible how ?

[GerdW]

Hi AJAYY,

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@AJAYY06 wrote:

I want to implement Modbus protocol over RS-232 for my SBrio board. is it possible ... ?

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Yes.

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@AJAYY06 wrote:

and how ?

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By writing code.

What have you tried?

Where are you stuck?

Which (specific) software environment do you use?

Did you try any of those ModBus libraries from VIPM?

[GerdW]

Hi AJAYY,

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@AJAYY06 wrote:

in sbrio 9638 can i use modbus communication, if it's possible how ?

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Please stick with your thread instead of creating multiple threads/discussions on the very same problem!

[rolfk · Accepted solution]

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@AJAYY06 wrote:

I want to implement Modbus protocol over RS-232 for my SBrio board. is it possible and how ?

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And why do you want to implement it yourself? There are about at least half a dozen existing libraries that do this in more or less similar ways. A quick search offers these options but I'm sure there are more:

https://www.ni.com/en/support/downloads/tools-network/download.modbus-master.html?srsltid=AfmBOoq1uD...

https://www.vipm.io/package/ni_lib_modbus_library/

https://knowledge.ni.com/KnowledgeArticleDetails?id=kA00Z0000019LP9SAM&l=nl-NL

https://github.com/plasmapper/modbus-client-labview

https://forums.ni.com/t5/Reference-Design-Content/LabVIEW-Modbus-API/ta-p/3524019

https://github.com/NISystemsEngineering/LabVIEW-Modbus-API

And some knowledge article from NI about how it principally works and what are some of their options:

https://www.ni.com/en/shop/labview/introduction-to-modbus-using-labview.html?srsltid=AfmBOooy09PEbKX...

I usually go with the second option above. It has its particularities that I would have solved differently but it does the job and is fairly easy to use.