Never used that driver but in Kepware it's
Discrete Inputs
ED00000-ED65535 (E is German I is English)
DWord, Long, Float
However, normally in S7 program PIWxx is the normal way to access I/O directly as a 16 bit word.
DB's
DB1-N.DBD00000-DBD65535
1-N is DB Block Number
DWord, Long, Float
For example : DB10.DBD2 (note: DW are 2 bytes so D0, D2, D4 Floats are 4 bytes so D0, D4, D8 & so on
Perhaps this may help but it may depend on how the I/O driver deciphers the addresses, not all suppliers use the same.