What are the correct jumper settings for my HI 2151/30WC or HI 2110 WI?

The HI 2151/30WC and HI 2110WI has a jumper listed as Prog/B12/B8 that was not present on the older units.  How do I know what to set this jumper to?

When the unit is ordered the jumper is set based on the configuration as ordered.  You should not need to change this jumper setting. 

The purpose of this jumper is to switch the operating program in the unit based on the communications option you have. 

The "Prog" position is to program the chip set and is only used by the factory.
The "B12" position is used when the unit has the Profibus communications option.
The "B8" position is used for all configurations that do not use the Profibus option.