So you have a timer value that is represented with a single digit of precision without using a decimal (using an integer). In this case, you would read from the device as you normally would, but you want to transform (or scale) it. In this case, you are just needing to divide by 10 (15 -> 1.5) to get it back to the PLC value (if that is the object here). I believe you can accomplish that through adjusting of the tag's Numeric settings by setting the Scale Mode to Linear and setting some values up to adjust it accordingly (1:100, 1:10). I believe this will get you what you want.