What function do the different zone settings have then ? This function lets you set the distance in different zones on the sensor:  detRangeCfg (par1 parA_s parA_e parB_s parB_e parC_s parC_e parD_s parD_e) 

If I use that, how can I read the data in the different zones ? 

What's the purpose of that if you can't read the data after you set it ?