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| Chapter 3 – Point Database | |
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Descriptor | Address1 | Application | Description | |
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| controller's Ul 1 input. The controller uses this value to | |
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| determine whether it is in heating or cooling mode. | |
FLOW START | 16 | All except | Determines how the damper modulation will be sequenced | |
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| 2560, 2561, 2597 | while in heating mode. When HTG LOOPOUT is above this | |
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| value, then FLOW STPT starts to increase. | |
FLOW END | 17 | All except | Determines how the damper modulation will be sequenced | |
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| 2560, 2561, 2597 | while in heating mode. When HTG LOOPOUT is below this | |
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| value, then FLOW STPT starts to decrease. | |
WALL SWITCH | 18 | All | YES indicates that the controller is to monitor the status of a | |
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| wall switch that is connected to UI 2. NO indicates that the | |
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| controller will not monitor the status of a wall switch, even if | |
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| one is connected. Valid input: YES or NO. | |
DI OVRD SW | {19}2 | All | Actual indication of the status of the override switch (not | |
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| physically available on all temperature sensor models) at the | |
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| room temperature sensor. ON indicates that the switch is | |
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| being pressed. OFF indicates that the switch is released. | |
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| Valid input: ON or OFF. | |
OVRD TIME | 20 | All except | The amount of time in hours that the controller will operate in | |
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| 2597 | day/occupied mode when the override switch is pressed while | |
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| the controller is in night/unoccupied mode. | |
NGT OVRD | {21}2 | All except | Indicates the mode that the controller is operating in with | |
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| 2597 | respect to the override switch. NIGHT indicates that the switch | |
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| has not been pressed and the override timer is not active. | |
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| DAY indicates that the switch has been pressed and the | |
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| override timer is active. The controller then uses a day mode | |
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| temperature setpoint. This point is only in effect when | |
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| DAY.NGT indicates night mode. | |
REHEAT START | 22 | All except | Determines how the reheat modulation will be sequenced | |
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| 2560, 2561, 2597 | while in heating mode. When HTG LOOPOUT is above this | |
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| value, then the reheat modulates upward. | |
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REHEAT END | 23 | All except 2560, 2561, | Determines how the reheat modulation will be sequenced | |
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| 2597 | while in heating mode. When HTG LOOPOUT is below this | |
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| value, then the reheat modulates downward. | |
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DIGITAL UI 2 | {24} | All | Actual status of a contact connected to the controller at UI 2. | |
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| ON indicates that the contact is closed; OFF indicates that the | |
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| contact is open. If a wall switch is used, it is connected to UI | |
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| 2. See WALL SWITCH. | |
DIGITAL UI 1 | {25}2 | All except | Actual status of a contact connected to the controller UI 1. ON | |
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| 2561 | indicates that the contact is closed; OFF indicates that the | |
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| contact is open. When a contact is connected as a digital | |
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| input, the analog input is not available. See AUX TEMP. | |
SERIES ON | 26 | 2564, 2565 | When flow rises above this value, the series fan will turn ON. | |
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SERIES OFF | 27 | 2564, 2565 | When flow drops below this value and other conditions have | |
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| been met, the series fan will turn OFF. | |
PARALLEL ON | 28 | 2566, 2567 | When flow drops below this value and other conditions have | |
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| been met, the parallel fan will turn ON. | |
DAY.NGT | {29} | All | Indicates the mode in which the controller is operating. Day | |
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| temperature setpoints will be used in day mode. Night | |
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| temperature setpoints will be used in night mode. This point is | |
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| normally set by the field panel. | |
PARALLEL OFF | 30 | 2566, | When flow rises above this value, the parallel fan will turn | |
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| 2567 | OFF. | |
CLG FLOW MIN | 31 | All except 2597 | The minimum amount of air in CFM (LPS) to be supplied to | |
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| 25 |
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Siemens Industry, Inc. |
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| BACnet ATEC Owner's Manaul | |
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| 4/20/2010 |
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