The manual is embedded in the MSVIEW aplication - use the help function
From the manual
Transition to Float Duty Cycle
Specify a duty cycle value between 0 and 100%. Duty cycle is roughly the percent of charge current that is being accepted by the battery. When the battery first reaches the Absorption setpoint, the duty cycle will be large (90% or more). As the battery comes to full charge at the Absorption setpoint, the duty cycle will decrease. The rate at which the duty cycle decreases depends on the amount of charging current, the size of the battery bank, the age of the batteries, and the amount of load current. Each of these factors can drastically affect the duty cycle value.
The recommended value is 30% but this is a very system-dependent adjustment.
High duty cycle setpoint values (90% or more) will begin the float timer almost as soon as battery reaches the Absorption voltage. While this makes for predictable float transition behavior, the battery may not be fully charged before dropping into float.
Note: Duty Cycle adjustment is supported in TriStar firmware v1.04.08 or later.
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I expect you have upgraded your firmware
Also note the comment about being very system dependent
They agree with what I have been saying the dip switches do not offer enough flexibility. You have a high end controller that can easily be customised to your needs.
