These selections provide the logic for controlling the operation of the application. The Unit Enable logic includes the option to delay startup after controller restart (Power Fail Restart).
The selection options for Optional Features are:
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Smoke Control Support (UL-864-UUKL): This option adds the Emergency Mode Network Input and the Smoke Control Sequencing for UL-864-UUKL State Generator module. In the State Selection Table, you can create state values for each Output Controller to provide normal control, pressurize, depressurize, purge, or shutdown. For example, if the Emergency Mode Network Input is set to shutdown, you can set all of the Output Controller states to the desired condition in the State Selection Table.
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Unit Enable: This option determines whether the application operates based on the Network Input (BV). If Unit Enable Switch is selected, then when the Network Input does not have a valid command from the network, it is considered unreliable (and the unit is enabled). If both BI and BV are selected, the state of both must be Enable for the unit to operate (that is, either input can be in a shutdown state to cause the unit to stop).
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Unit Enable Switch (BI): This option determines whether the application operates based on the Hardware Input (BI). If Unit Enable is selected, then when the Network Input does not have a valid command from the network, it is considered unreliable (and the unit is enabled). If both BI and BV are selected, the state of both must be Enable for the unit to operate (that is, either input can be in a shutdown state to cause the unit to stop).
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Power Fail Restart: This feature is available as part of the Unit Enable Determination State Generator module. When this option is selected, after a restart (power cycle, transfer to the controller, or manual restart command), the application is held in the shutdown state for the Power Fail Restart Time (default = 60 seconds).