AHU Humidity Control

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I am having some trouble knowing what I should be doing to model this AHU in a building that has humidity control. From my understanding, there is a limit on the supply air humidity ratio (SAH) and a setpoint on the return air humidity ratio(RAH) at the AHU level and not at the zone level. I understand that I can put in the SAH in my energy model with one of the setpoint managers, HumidityMaximum I believe. Then comes my confusion, for humidification and de-humidification in energy plus there has to be a ZoneControl:Humidistat which would require a humidifying and de-humidifying schedule applied to each of the zones. What values should I be using for those two schedules is where I am stuck.

If anyone has an input that would be great. I have done some digging and came across link text and link text which have helped me understand what is required to control humidity.