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Variable
Global_Alarm
BMS_Watchdog_Active
OAD_Feedback_Error_Not_
Economizing.Active
OAD_Feedback_Error_
Economizing.Active
OAD_Feedback_Error_OAD_Not_
Modulating.Active
OAD_Feedback_Error_Excess_
OA.Active
*Indicated point included in BACnet Short List
System Word Table (IV-10)
Bit
System_Word
0
Heat Wheel Enable
1
Preheat Enable
2
Reversing Valve (Cooling (0)/Heating(1))
6
Supply Temp Low Limit Alarm
7
Supply Temp High Limit Alarm
8
Supply High Duct Static Alarm
9
Supply Fan 1 Alarm
10
Exhaust Fan 1 Alarm
11
Drain Pan Alarm
12
Freeze Stat Alarm
13
Filter Alarm
14
Space High Static Alarm
15
Return Low Static Alarm
16
Shutdown Input Alarm
17
Energy Recovery Wheel High Diff Pressure
18
Energy Recovery Wheel Rotation Alarm
20
Heat Pump Heating Lock Out Alarm
21
Permanent Memory - Too Many Writes
22
BMS Offline Alarm
28
Heat-Cool Only - Dehumidification Request Active
29
Heat-Cool Only - Heating Request Active
30
Heat-Cool Only - Coil Setpoint Alarm Active
31
Heat-Cool Only - Supply Setpoint Alarm Active
46
Microprocessor Controller for DOAS
Appendix E: Points List
Description
General alarm point Optionally set to
indicate any alarm is active, or a shutdown
alarm is active
Status of the BMS watchdog heartbeat
Feedback indicates OAD is not opening
during economizer
Feedback indicates OAD is open
Feedback indicates the OAD is not
modulating
Feedback indicates the OAD is not closing
BACnet Modbus
Object
Register
BV-23*
10003
BV-24
10004
BV-25*
10005
BV-26*
10006
BV-27*
10007
BV-28*
10008
System Word Table (IV-11)
Bit
Unit_Status_Word
0
Off/Standby
1
Unoccupied Start
2
Occupied Start
3
Opening Dampers
4
Dampers Open
5
Fan Start Delay
6
Exhaust Fan On
7
Supply Fan On
8
System On
9
Soft Shutdown
10
System Disabled
11
Remote Off
12
System Shutdown Alarm
13
Supply Fan Only
14
Exhaust Fan Only
15
Purge Mode (Supply and Exhaust Only)
16
Case Heat Active
17
Fans Only
18
Economizing
19
Energy Recovery Active
20
Cooling
21
Heating
22
Dehumidifying
23
Hot Gas Reheat Active
24
HGRH Purging
25
Dehum w/Heat
26
Energy Recovery Defrost Active
27
Heat Pump Defrost Active
28
Morning Warm Up/Cool Down Active
29
Winter Ramp Active
31
Overrides Active
Read
Text or Unit of M
or
Active Inactive
Write
R
Alarm
Normal
R
Active
Inactive
R
Alarm
Normal
R
Alarm
Normal
R
Alarm
Normal
R
Alarm
Normal
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