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From Modbus application protocol specification, the address range of each datatype (coil, discrete input, holding register, input register) is 0-65535, but I tried several softwares (like Modscan32). They only support manipulation of coils addressed within 0-9999, discrete inputs within 10000~19999, holding registers within 40000~49999, input registers within 30000~39999.
Why?
Why?