Protože modem neví, jaká data jsou v cache obsažena, vrací na různé typy (funkce) dotazů se shodnou adresou stejná data. Tzn. pokud program v Slave automatu umístil na určitou pozici v cache bitová data (vstupy/výstupy) a na tuto pozici se Master dotáže jako na registry, jsou tato data vrácena jako obsah registrů.
The previous text is in Czech. Here is a translation to English: As the modem does not know what data is contained in cache it returns the same data to various types (functions) of requests with the same address, i.e. if the program in the Slave PLC positioned bit data (inputs/outputs) in a specific position in cache and the Master makes a request to this position like to a register this data is returned like the content of the registers.