I need to communicate process parameters (via Modbus Ethernet) to a third party analysis application which runs on Linux. Can anyone suggest a supplier of software modules that I can propose to the developer of the Linux application (rather than suggest he writes a Modbus Ethernet slave driver from scratch!).

 

Have a look at the FieldTalk Modbus Master and Slave Protocol Packs at www.focus-sw.com. These protocol packs are available for Linux, Java, Solaris, DEC True64, SGI Irix, QNX and Windows.

Henrik W Maier
FOCUS Software Engineering
Contract Software Development - FieldTalk Modbus Protocols
Brisbane, Australia - http://www.focus-sw.com

 

The MatPLC has a modbus module, but unfortunately the slave side is not yet finished. However, it might still be a help, certainly the lower layer of the protocol is functional (it's used by the master module), and I'm not sure how much the upper layer is missing.

http://mat.sf.net and ask on the mailing list - there's been recent activity in this area

The MatPLC is under the GPL, so the developer will have to give you the source code, but you were probably going to ask for that anyway, so it makes little difference.

Jiri
--
Jiri Baum <[email protected]> http://www.csse.monash.edu.au/~jirib
MAT LinuxPLC project --- http://mat.sf.net --- Machine Automation Tools

 

I am working at a company which has developed a Linux-based SCADA system which is able to communicate with Modbus. If you want further information from the protocol developer, please let me know.

Regards Andreas Hobein [email protected]

 

Checkout www.sunlux-india.com\MODBUSProtocolSuite.htm for a ANSI 'C' Source Code Library implementation of the MODBUS RTU Master and Slave Stacks. This can be easily ported onto Linux within 16-20 hours (the vendor may already have a Linux port, please check with them).

 

I am not sure whether you are looking for simple MODBUS on Ethernet or
MODBUS TCP .MatPLC , has Modbus RTU,ASCII and TCP master modules , developed
on Linux . This is open source .