It has been several years since I did any work with Horner products. Back when I did, they followed the GE style of addressing. If they still do, the data from the analog input module will show up in %AI memory. For a 0 - 10 volt range, the value in the %AI memory location will be between zero for zero volts and 32000 for 10 volts.
Unless you are using an analog module that allows for scaling the %AI data in the configuration of the module, in which case you will have to look at the configuration details.
Danw, Cscape is Horner's programming software.