Question-and-Answer Resource for the Building Energy Modeling Community
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In this case, use ExternalInterface:Actuator and keep the base Schedule:* object in the idf. From the Input Output Reference for ExternalInteface:Actuator "Initial Value"
This field contains the initial value. If a value is specified, then this value is used during the warm-up period and the system sizing. If no value is specified, then the actuated component will only be updated once the time stepping starts, i.e., after the warm-up and the system-sizing. This allows, for example, to schedule a setpoint with a Schedule:Compact during warm-up and system-sizing, and then overwrite the value of this schedule during each zone time step based on a feedback control loop that is implemented in the BCVTB.
