60
ED 15117
Measurement
Units
Data Type
Usable Range
Default Value
Event Count
NA
L
ON
W
ORKS
: structure
See Below
0 = Pump No. 1
L
ON
W
ORKS
L
ON
W
ORKS
Name
Profile
SNVT Type
SNVT Index
SNVT Size
nviPumpSelect McQuayChiller
SNVT_switch
95
two
bytes
Valid Range
State
Value
Pump Select
0
unused
Pump No. 1
1
unused
Pump No. 2
Receive Heartbeat
This read/write configuration property defines the maximum time that elapses after the last update to a
specified network variable input before the unit starts to use the value contained in the corresponding
network configuration variable (nci). This variable is only applicable when nciDefaults is set to 0. If
nciDefaults is set to 1, the nvi’s remain as the value written from the network regardless of the receive
heartbeat time.
The variables that use Receive Heartbeat are:
nviCapacityLim
nviChillerEnable
nviCoolSetpt
nviHeatSetpt
nviIceSpt
nviMode
Measurement
Units
Data Type
Usable Range
Default Value
Elapsed Time seconds
(0,1)
BACnet: Unsigned Integer
L
ON
W
ORKS
: Fixed Point
Scalar - unsigned long
0.0 – 6553.4 sec (0.1
sec).
0xFFFF represents
invalid data
0 Seconds
LonWorks
L
ON
W
ORKS
Name Profile
SNVT Type
SNVT Index
SNVT Size
SCPT_Reference
SCPT Index
nciRCvHrtBt Chiller time_sec 107
two
bytes
SCPT_maxRcvTime 48
Run Enabled
This read only network variable indicates the running mode of the Chiller. The Run Enabled network
variable indicates that the chiller can start if operating conditions are met.
Measurement
Units
Data Type
Usable Range
Default Value
Chiller Status
NA
BACnet:
Enumerated
L
ON
W
ORKS
:
Structure
See Below
NA
BACnet
Object Identifier
Property Identifier
Object Type
Type Enumeration
Instance
Property Name
Property Enumeration
Binary Input
3
5
Present Value
85
Object Name
UnitOFF
