ED15117
49
Cool Setpoint - Network
This read/write network variable is used to change the Cooling setpoint from the network. It sets the
temperature of the Leaving Chilled Water when the chiller is operating in the Cooling Mode. It cannot
be set below the local Cool Setpoint.
Measurement
Units
Data Type
Usable Range
Default Value
Temperature
°F/°C
BACnet: Real
L
ON
W
ORKS
: Fixed Point Scalar signed
long
35°-80°F
1.7°-26.7°C
44°F/6.6°C
BACnet
Object Identifier
Property Identifier
Object Type
Type Enumeration
Instance
Property Name
Property Enumeration
Analog Value
2
4
Present Value
85
Object Name
NetworkCoolTempSetpoint
L
ON
W
ORKS
L
ON
W
ORKS
Name Profile SNVT Type SNVT Index
SNVT Size SCPT_Reference SCPT Index
nviCoolSetpt Chiller
temp_p 105
two
bytes NA
NA
Cool Setpoint
Unless the configuration parameter nciDefaults =1, the Cool Setpoint Network variable (nviCoolSetpt)
is set to this configuration value (nciCoolSetpt) upon unit controller power-up or loss of
communication. If nciDefaults = 1, then nviCoolSetpt retains the last valid value at the time power is
restored. Refer to the Magnitude Chiller Unit Controller Operation Manual for suitable variable values.
Loss of communications is determined by Receive Heartbeat (nciRCvHrtBt). If Receive Heartbeat is
greater than zero, then communications is lost when nviCoolSetpt is not written to again prior to the
expiration of the Receive Heartbeat timer. Each time nviCoolSetpt is written, the Receive Heartbeat
timer is reset. If Receive Heartbeat is set to 0, then this function is disabled and communication loss is
never detected.
Measurement
Units
Data Type
Usable Range
Default Value
Temperature
°F/°C
Fixed Point Scalar signed
long
L
ON
W
ORKS
: 1.6°-
26.6°C
6.6°C
L
ON
W
ORKS
L
ON
W
ORKS
Name Profile SNVT Type SNVT Index
SNVT Size
SCPT_Reference
SCPT Index
nciCoolSetpt
Chiller temp_p
105
two bytes SCPT_CoolSetpoint
75
Current Date & Time
This network variable is used to synchronize the chiller’s internal time clock with the BAS.
Measurement
Units
Data Type
Valid Range
Default Value
Alarm Timestamp
NA
Structure
See Below
NA
BACnet
No equivalent value. BACnet should use DM-TS-B and DM-UTC-B services.
