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You can see some of the data from the OZW672/RVS41 here: http://veldzicht.org/solar/siemens/rvs.asp All data from OZW/RVS can be viewed and some parameters can be changed in the webinterface from the OZW. There is fault history, but there is no logging of any data, so i have to build that myself on ...

Hello amalia, Just finished some of the same work on my Waterstage with RVS56.183 controller. The BSB is a Boilers System Bus for control between heating en thermostat etc. There is also a LPB bus (Local Process Bus) for connecting other apparatus for controlling the RVS. In my case i bought a OZW67...