Eclipse Community Forums: 4DIAC - Framework for Distributed Industrial Automation and Control » Extending Modbus support to support writing

Home » Eclipse Projects » 4DIAC - Framework for Distributed Industrial Automation and Control » Extending Modbus support to support writing

Show: Today's Messages :: Show Polls :: Message Navigator

Extending Modbus support to support writing [message #1787584]

Tue, 29 May 2018 15:41

Agostino Mascitti

Messages: 15
Registered: May 2018

Junior Member

Hello,

I need to use the Modbus protocol and I saw that it is only available at the moment for reading values (see readme file in its folder). I need to write values in Moxa IoLogik E1210 and E1211. Would it be very hard to implement these new functionalities? Could you give me some hints about how to integrate the feature?

Thank you for the help in advance!

Report message to a moderator

Re: Extending Modbus support to support writing [message #1790553 is a reply to message #1787584]

Tue, 12 June 2018 18:59

Alois Zoitl

Messages: 1583
Registered: January 2014

Senior Member

Dear Agostino,

I thought that also some basic writing functionality is also available. But I'm really not sure. The modbus code would need a major update. Maybe even migrate it to the new IO infrastructure.
But for starting you could look at the existing code. writing would be performed in the send function of the modbus layer. Any improvements on our modbus implementation would be very welcome.

Cheers,
Alois

Report message to a moderator

Re: Extending Modbus support to support writing [message #1790572 is a reply to message #1787584]

Wed, 13 June 2018 07:17

Agostino Mascitti

Messages: 15
Registered: May 2018

Junior Member

Dear Dr.Alois,

Thank you for your reply! In the official guide it is written only "Read Coils, Read Discrete Inputs, Read Holding Registers, Read Input Register" and consequently my conclusion.

Agostino

Report message to a moderator

Re: Extending Modbus support to support writing [message #1790584 is a reply to message #1790572]

Wed, 13 June 2018 09:07

Alois Zoitl

Messages: 1583
Registered: January 2014

Senior Member

I had a quick look in the code and there is also a send data implemented. Which takes the imput data and sends it to the device. Also in the readme I found something referencing send addresses. But I don't know how well and to what extend this is implemented.

Report message to a moderator

Previous Topic:	FORTE Monitoring: same response for different mistakes
Next Topic:	Enabling Exceptions

Goto Forum:

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

]

Current Time: Fri Apr 19 21:41:36 GMT 2024

.:: Contact :: Home ::.

Breadcrumbs

Sign up to our Newsletter