Greenheck AMD-xx-TD Series Dampers (478799 IOM). - Manual (Page 7)

7
BACnet Data Point List
Table 1 lists and describes all of the BACnet data points associated with the controller inside the actuator of
BACnet enabled AMD-TD series dampers.
Name Type # Access Description
Greenheck AMD-TD AI 1 C Displays the application version
AirflowSetpoint AI 2 C Displays the real-time setpoint in cfm
CurrentAirflow AI 3 C Displays the real-time volumetric airflow rate in cfm
AirVelocity AI 4 C Displays the real-time air velocity in fpm
DamperPosition AI 5 C Displays the real-time damper position as a percentage (0% - fully
closed; 100% fully open)
MaxCFMSetpoint AI 6 C Displays the maximum volumetric airflow rate in cfm. This value
is a function of the value selected for "Maximum FPM". (Max CFM
Setpoint = Damper Area * Maximum FPM).
DamperArea AV 1 C Represents the nominal damper face area in square feet. Set by the
factory.
MinimumFPMSetpoint AV 2 C Represents the minimum allowable velocity setpoint in fpm. If the
actuator receives a setpoint below the "Minimum FPM Setpoint" the
setpoint will be set to zero. The factory default value is 100 fpm.
BACnetSetpoint AV 3 C When the Setpoint Source is set to BACnet this variable establishes
the unit's setpoint. When the Damper Mode is set to Flow the BACnet
Setpoint is a percentage of the MaxCFM Setpoint. When the Damper
Mode is set to Position the BACnet Setpoint is the percentage the
damper is open. When the Setpoint Source is set not set to BACnet
this variable has no impact on controlling the damper.
SafetyStatus BI 1 C Represents the status of the safety circuit. Inactive = Open/Failure;
Active = Closed/OK
MaximumFPM MV 1 C Represents the maximum setpoint velocity in fpm. The value this
variable is set to corresponds to a 10 VDC input to the actuator. This
value is set at the factory based on maximum velocity that was
selected at the time the unit was ordered. 1 = 500 fpm; = 1000 fpm;
3 = 1500 fpm; 4 = 2000 fpm; 5 = 2500 fpm; 6 = 3000 fpm; 7 = 3500
fpm; 8 = 4000 fpm
DamperMode MV 2 C Establishes the mode of operation for the actuator. When in flow
control mode the actuator will view the setpoint as a target cfm to
maintain. When in position control mode the actuator will view the
setpoint percentage as a position to drive to (0% fully closed, 100%
fully open). Whether the actuator is in Flow or Position control mode
the source of the setpoint will be determined by the Setpoint Source
variable. 1 = Flow; 2 = Position
SetpointSource MV 3 C When set to BACnet the actuator uses the BACnet variable as the
setpoint. When set to Local AI it uses the actuator's second analog
input (S2) as the setpoint. When set to Zth the actuator uses a
handheld Zth module to establish the setpoint. 1 = BACnet; 2 = Local
AI; 3 = ZTH
AI - Analog Input
AO - Analog Output
AV - Analog Value
BI - Binary Input
BO - Binary Output
BV - Binary Value MI - Multi-State Input
MO - Multi-State Output
MV - Multi-State Value
R - ReadOnly
W - Writable
C - Commandable
(Contains Priority Array)