ACC-SVN100A-EN • LonTalk Communication Interface 27
Network Variable and Configuration Property Definitions
nviHeatSetpt
Hot water setpoint, SNVT_temp_p
• Default: Uses nciHeatSetpt
• Invalid value: 0x7FFF = 327.67°C
• Range: -273.17°C to 327.66°C (limited at chiller) or Invalid
This input network variable provides the heating setpoint when the chiller is operating
in the heat mode. This will be ignored if the control is in cooling mode. Any setpoint value
received will be clamped into a valid range by the chiller.
nciLocation
Location label, SNVT_str_asc
• Default: No Unit Config Required
• SCPT reference: SCPTlocation (17)
• Range: Any valid string
This configuration property provides a description of the location of the unit.
nviMode
Operating mode request, SNVT_hvac_mode
This input network variable provides the mode of operation of the chiller and provides
the ability for another node on the network to place a chiller in another mode.
Structure definition
Type
Enumeration
name
Enumeration
definition
a
Default
Unsigned 8-bit hvac_t 1 = HVAC_HEAT
3 = HVAC_COOL
10 = HVAC_FREE_COOL
11 = HVAC_ICE
uses nciMode
a
Other enumeration definitions for hvac_t, as defined by LonMark, are not used by the UC800
controller and have no effect on its operations.
