Daikin McQuay ED 15117, Protocol Information

Page: 55 / 77

ED15117 55
L
ON
W
ORKS
Name Profile SNVT Type SNVT Index SNVT Size SCPT_Reference SCPT Index
nviHeatSetpt Chiller SNVT_temp_p 105 two bytes NA NA
Heat Setpoint
Unless the configuration parameter nciDefaults =1, the Heat Setpoint Network variable (nviHeatSetpt)
is set to this configuration value (nciHeatSetpt) upon unit controller power-up or loss of
communication. If nciDefaults = 1, nviHeatSetpt retains the last valid value at the time power is
restored. Refer to the Magnitude 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 prior to the expiration of the
Receive Heartbeat timer. The Receive Heartbeat timer is reset each time nviHeatSetpt is written. 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 L
ON
W
ORKS
: Fixed Point Scalar
signed long
37.7-65.5°C 57.2°C
L
ON
W
ORKS
L
ON
W
ORKS
Name Profile SNVT Type SNVT Index SNVT Size SCPT_Reference SCPT Index
nciHeatSetpt Chiller SNVT_temp_p 105 two bytes SCPT_HeatSetpoint 78
Ice Setpoint - Network
This read/write network variable is used to change the Ice setpoint from the network. It sets the
temperature of the Leaving Chilled Water when the chiller is operating in the Ice Mode.
Measurement Units Data Type Usable Range Default Value
Temperature °F/°C BACnet: Real
L
ON
W
ORKS
: Fixed Point Scalar signed long
14.9 to 35.06°F
-9.5 to 1.7°C 24.98°F/-3.9°C
BACnet
Object Identifier Property Identifier
Object Type Type Enumeration Instance Property Name Property Enumeration
Analog Value 2 7 Present Value 85
Object Name
NetworkIceTempSetpoint
L
ON
W
ORKS
L
ON
W
ORKS
Name Profile SNVT Type SNVT Index SNVT Size
nviIceSpt McQuayChiller SNVT_temp_p 105 two bytes
Ice Setpoint
Unless the configuration parameter nciDefaults =1, the Ice Setpoint Network variable (nviIceSpt) is set
to this configuration value (nciIceSetpt) upon unit controller power-up or loss of communication. If
nciDefaults = 1, nviIceSpt 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 communication is lost if nviIceSpt has not been written to prior to the expiration of the
Receive Heartbeat timer. The Receive Heartbeat timer is reset each time nviIceSpt is written. 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 L
ON
W
ORKS
: Fixed Point Scalar signed long -9.4°-1.7°C -3.9°C