Emerson E2 operation manual Alternate Control, Schedule Interface Cell, Multi-Logic Combiner

Both OFF strategy, except only the light level state must turn OFF in order to turn the output from ON to OFF.

•LLEV ON/Both OFF - Like the Both ON/ Both OFF strategy, except only the light level state must turn ON in order to turn the output from OFF to ON.

•Both ON/Any OFF - Like the Both ON/Both OFF strategy, except any of the two states that turn from ON to OFF will result in the output turning OFF.

The LOGIC IN input should not be used to compare the light level state to a Time Schedule output or a similar digital state that represents OCCUPIED/UNOCCUPIED. Schedule comparisons are handled by the Schedule Inter- face cell. If a schedule input value is the only digital value you will be using to combine with the light level sensor value, choose the “LLEV ONLY” combination for this cell.

Occupied/Unoccupied and Alternate Settings

If desired, the Light Level Interface cell can be set up with a set of unoccupied Cut In/Cut Out setpoints. To do this, the Light Level Interface cell relies on a separate dig- ital input to tell it when to use occupied or unoccupied set- points.

The Light Level Interface cell can also be set up with a set of alternate occupied and unoccupied setpoints, used only when the value of the input called USE ALT LLEV COMB is ON.

11.10.4.2The Schedule Interface Cell

(SCHEDIF)

The Schedule Interface cell is similar in function to the Light Level Interface cell, except it is used to logically combine the output of the Light Level Interface cell with that of the Basic Schedule cell. The Schedule Interface cell allows you to choose how the light level sensor and the time schedule work together to control the lights.

Logical Combinations

The output of the Schedule Interface cell represents the final ON/OFF state of the lights. It determines this state by performing one of the logical combinations listed below:

•LLEV/Logic Only - The Schedule Interface cell uses the input from the Light Level Interface cell as its output, ignoring the value passed to it from the Basic Schedule cell.

•Sched Only - The Schedule Interface cell uses the input from the Basic Schedule cell as its output, ignoring the value passed to it from the Light Level Interface cell.

•Both ON/Both OFF - From an output=OFF state, when both the Light Level Interface input and the Basic Schedule input are ON, the resulting output command will be ON. The output command will remain ON until both the Light Level and Basic Schedule inputs turn OFF.

•Both ON/Sched OFF - Like the Both ON/ Both OFF strategy, except when the Sched- ule Interface output is ON, it will turn off only when the Basic Schedule input turns OFF.

•Sch ON/Both OFF - Like the Both ON/Both OFF strategy, except when the Schedule Interface output is OFF, it will turn ON only when the Basic Schedule input turns ON.

•Both ON/Any OFF - Like the Both ON/Both OFF strategy, except when the Schedule Interface output is ON, it will turn OFF if any input turns OFF.

If desired, the final result of any of the above combina- tions can be inverted by setting a parameter.

Alternate Schedule Interface Combinations

If desired, you can specify an alternate means of com- bining the Schedule Interface cell inputs that is used only when the Use Alt Sched Comb input is ON.

11.10.5 Alternate Control

Alternate control comprises Multi-Logic Combiner and Offset Solar Control strategies.

11.10.5.1 Multi-Logic Combiner

When the Alternate Lighting Control (Use Alt Con- trol) parameter under the General tab in Setup of the application is set to Yes, an alternate lights on/off combi- nation method is then used to turn lights ON and OFF. The user is then presented with a logical matrix where they can select which inputs will turn lights ON and OFF. This matrix is located under the Alt Control tab in Setup of the application.

The Number of Inputs parameter (Num Inputs), located under General tab in Setup of the application, specifies the number of input sources made available in the matrix. Up to four input sources may be used: Sched- ule, Solar, Light Level, and Logic.

TIP: Activating the Use Alt Control parameter is the only way to use the Solar Calculation Control method for Lighting Control.

Lighting Schedules Software Overview • 11-33