Map OBIS Codes

[Mr.D]

I just received a new powermeter and it is possible to connect to this with an ethernet cable. From the modbus page I can see its possible to connect with ip adresse and TCP connections. However, I do I interpret the values been received. From the user guide I have a map of the OBIS Codes/Values.... I have another powermeter connected with modbus and this one uses registers to map the data. 

Anyone knows how to do this?
The powermeter is a KAIFA...