Hi, I confirm that via modbus you can manage your vitovent 200-c from your vitocal 200-s. I have the same setup and it works. However, it does point out some problems I encountered during the installation. Having already had the external unit connected via Modbus and a command expansion, I had to buy a card that increases the Modbus connections that Veissman sells. You also have to buy a special cable that Veissman sells. After enabling the vitovent on the vitocal you will be able to manage the vitovent from the ViCare app. You cannot directly control the 0-10V on the machine's terminal board because it would fail. You can only control the maximum speed of the VMC with a clean contact. If you have any other questions just ask. Sorry for my bad English.
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