fix: Use correct modbus addresses for Janitza UMG96RM(E) meter #2930
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Implementation used 8xx addresses which are programmable. Switched to 190xx addresses, which cannot change. See https://www.janitza.com/files/download/manuals/current/UMG96RM/E/janitza-mal-umg96rme-en.pdf page 19.
I've tested this change with two different setups
Setup 1: Meter was programmed in the 8xx address range and working before this change with OpenEMS. After this change it still worked.
Setup 2: Meter was not programmed in the 8xx address range and not working before this change with OpenEMS. After this change it worked.