Question about Modbus addressing

Hello everybody.
I have a specification of a certain device, in which a set of Modbus input
registers have addresses from e.g. 30100 to 30200. Does it mean that I have
to put these address values directly to my request packet or I have to
subtract 30000 and turn them to 100 - 200?
I could not find any instruction of that kind in Modbus protocol
specification.
Regards and thanks
Alex


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