A binding is a connection between two or more variables for data exchange. In its simplest form, a binding consists of a source and a destination. The destination reads the value from the source.
In Building Operation, you typically bind source values to destination properties in objects such as programs, alarms, trend logs, and graphics. These objects frequently need to use values that exist somewhere else in the system.
Bindings are used in schedules the same way that bindings are used throughout the system. You bind a schedule to a point in order to control the value with the schedule. The following examples demonstrate the different uses of schedules and bindings.
You bind an analog schedule to an analog output, such as a thermostat setpoint. When the schedule dictates a change in temperature, the system sends the output information to the setpoint for the thermostat to act on. For more information, see Binding an Analog Value to an Analog Schedule .
You bind a digital schedule to a digital output, such as a light switch. The system will switch the light on or off depending on the value set in the schedule. For more information, see Binding a Digital Value to a Digital Schedule .
You bind a multistate schedule to a multistate output, such as an air handler. When the schedule dictates a change in air flow, the system will send the output information to the air handler depending on the value of the state set in the schedule. For more information, see Binding a Multistate Value to a Multistate Schedule .