I am researching the IEC 60870-5 family protocols and in particular IEC-101 and IEC-104, for a university project. Although purchasing the IEC-101 and IEC-104 standards, i am still left with fundamental questions that i can't seem to find answers for using Google. I am now focusing on understanding every Type Identification - its purpose, what its use, how to use it and draw a simple flow of each. The standards doesn't supply the necessary information about the commands. Can anyone refer me to some website where these things are explained or any forum where i can ask question about these standards?
Any help is appreciated.
Answer
We developed a new implementation of IEC 60870-5-104 as a part of the Eclipse SCADA project. It available since the 0.2.0 M3 Milestone build. (https://www.eclipse.org/eclipsescada/news/2014/07/01/releases__0_1_3_and_0_2_0_m3.html)
You can also use it standalone without the other Eclipse SCADA dependencies (it has some dependencies on slf4j and netty and some other minor stuff).