Not able to find modbus version

[phy455]

Hello,

I am using libmodbus version 3.1.4.

In this library I am not able to identify which modbus protocol version is supported..

Could you please provide modbus protocol version?

Also in latest release which modbus protocol version is supported?

[karlp]

what versions of modbus protocol are you looking for? there's "only one"

[Ritesh236]

@karlp ,

Thanks for your feedback.

We just want to know more information including version information about modbus protocol which is being used.

[Ritesh236]

@karlp ,

I just want to know like "MODBUS APPLICATION PROTOCOL SPECIFICATIONV1.1b3" or any other as per information provided over Modbus

[karlp]

that one then.

[Ritesh236]

@karlp ,

so libmodbus library is following MODBUS APPLICATION PROTOCOL SPECIFICATIONV1.1b3. correct?

So that we can have idea to move further for that.

Please confirm from your end and also if possible then let us know how i can check into libmodbus library

Regards, Ritesh Prajapati

[david-glover]

@Ritesh236,

Yes, libmodbus should conform to that specification. In the documentation, under external documentation, it links to the Modbus page, http://www.modbus.org/specs.php. The 1.1b3 is the most recent document (2012). Modbus is not like BACnet, which has multiple protocol revisions that add new features.

If you want to try out the library, I suggest you clone the git and examine the tests. There are client/master and server/slave examples that can be used for either TCP or serial / RS-485.

Regards, David

On Thu, Jan 16, 2020 at 1:50 PM Ritesh236 [email protected] wrote:

@karlp https://github.com/karlp ,

so libmodbus library is following MODBUS APPLICATION PROTOCOL SPECIFICATIONV1.1b3. correct?

So that we can have idea to move further for that.

Please confirm from your end and also if possible then let us know how i can check into libmodbus library

Regards, Ritesh Prajapati

— You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub https://github.com/stephane/libmodbus/issues/515?email_source=notifications&email_token=AIFBDENPWZMOAVTASIEMJ73Q57YSZA5CNFSM4KFCU2PKYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOEJC3TEY#issuecomment-574994835, or unsubscribe https://github.com/notifications/unsubscribe-auth/AIFBDEP7Z5AMTLGD36EPMTLQ57YSZANCNFSM4KFCU2PA .

[Ritesh236]

@david-glover ,

Thanks for your feedback and quick response for same.

Yes. We have already taken that library with version which I have mentioned earlier and also validated client/master and server/slave with examples.

So, Thanks again for confirmation about that and will let you know if any further query regarding that

Regards, Ritesh Prajapati

[karlp]

@Ritesh236 can we close this issue then?

[Ritesh236]

@karlp ,

Yes. We can close this issue now. Thanks for your kind support for that.

I will raise new issue if any related to this.

Regards, Ritesh Prajapati