The following table describes the attributes used by the Damper Control for Economizer modules.
|
Name |
Type 1 |
Description |
Default Value |
|---|---|---|---|
|
Damper Control Status |
V |
Contains the PID Status, and the possible values are Normal, Overridden, Disabled, Low, Timing Low, High, and Timing High. |
Normal Set Name: Control Status |
|
Exhaust Percent Cmd |
V |
Controls the exhaust air damper. The exhaust air damper is commanded from 0% to 100%. |
0% |
|
FSCS OAD Cmd 2 |
FSCS Outdoor Air Damper Command |
||
|
FSCS EAD Cmd 22 |
FSCS Exhaust Air Damper Command |
||
|
FSCS RAD Cmd2 |
FSCS Return Air Damper Command |
||
|
Low Limit Process Variable |
Contains the low limit temperature process variable. This temperature is usually the mixed air temperature or the preheat air temperature. |
13 °C, 55 °F |
|
|
Low Limit Proportional Band |
Specifies the range across which the damper is proportionally modulated shut as the Low Limit Process Variable drops below the Low Limit Setpoint. |
5 °C, 9 °F |
|
|
Low Limit Setpoint |
Contains the upper threshold for the low limit temperature, below which the damper is proportionally modulated shut during normal control modes. |
7 °C, 45 °F |
|
|
MAD-OUTSTATE (State) |
V, G |
Operating state as determined by the Mode input. |
Close Set Name: AHU OA Damper Control |
|
Minimum OA Position |
Defines the minimum position for the OAD and the EAD. |
0.0% |
|
|
Mode |
Contains the desired mode of operation |
CloseSet Name: AHU OA Damper Control |
|
|
OA Percent Cmd |
V |
Controls the outdoor air damper. The outdoor air damper is commanded from 0% to 100%. |
0% |
|
Output Overridden |
Indicates when the actual output that is controlled by this output controller is overridden by a user. |
False |
|
|
PID Tuning Reset |
Causes the PID objects to reset their tuning parameters to the default based on the appropriate Process ID. |
Normal Set Name: PID Tuning Reset |
|
|
Process ID |
Contains the type of cooling process that this output controller is controlling when the mode is T Control. |
DA-T Set Name: Process ID |
|
|
Process Units |
Specifies the units for the cooling PID. For this particular module, °C and °F are the only two valid values. |
°C, °F Set Name: Unit |
|
|
Process Variable |
Contains the control temperature. Either Zone temperature, discharge air temperature, or return air temperature may be connected to this input. |
13 °C, 55 °F |
|
|
Ramp Rate |
Defines the rate of change in damper position. This input is used in the Ramp Min OA and Ramp Open state. |
50.0 Change per minute |
|
|
Return Percent Cmd |
V |
Controls the return air damper. The return air damper is commanded from 0% to 100%. |
0% |
|
Setpoint |
Control temperature setpoint. |
13 °C, 55 °F |