I'm assuming you tried just pulling down 1 for digital and 1 for analog using the correct functions and got an error?
If I had to guess their register numbers are just offsets and they expect you to add the multiplier to get it within the typical range.
So digital register 1 is likely 00001 or 10001 depending if they consider it a coil or discrete input register.
Likewise the analog register 1 is likely 30001 or 40001 for inputs or holding registers.
>specifying the type of registers these are.
They all appear to be signal registers so they will all be integer types, not floating.
Its Modbus, you need to read between the lines and when all else fails, trial and error.