Honeywell TC500A Integration Guide

70Situational BACnet guidelines for TC500A
Situational BACnet guidelines for TC500A
Table 31: BACnet guidelines for TC500A
FeatureLimitation / BehaviorDescriptionWorkaround
Schedule / HolidayCalendar object is not
supported
Current implementation of thermostat
does not support calendar object and If
user wants to configure holiday list for a
schedule apart from special events
then HMI is the option to configure
holiday schedule.
HMI is the option to
configure holiday
schedule.
ScheduleSchedule does not work
properly if effective period
and default output is written
from Niagara
The schedule default output is set to
Unoccupied mode. User should not
change this property over BACnet.
The schedule effective period is
enabled always. User should not
change this property over BACnet.
Makes sure default
output and effective
period set as true in
Skip writes facets
ScheduleModes supported by
thermostat are 0, 1 and 3
Modes and corresponding Enum
values are
NA
ScheduleNiagara allows all types of
date range while creating
special events which is not
supported by thermostat
Thermostat does not support floating
date type special events. If user try to
write special events with unsupported
date range format, then schedule read
operation does not work until deleting
the unsupported date range special
events from Niagara database.
NA
ScheduleSpecial / Holiday events are
supported for the 3 years
duration.
Special / Holiday can create more than
3 years in Niagara, but thermostat
supports only for 3-year duration
NA
Device ObjectUnsupported object and
service is claimed in the
device object capabilities
The device capabilities list shows many
of the unsupported object and services,
it will not impact any functionality
issues and will be hidden future release.
NA
AlarmUnsupported Intrinsic Alarm
Property is being exposed in
the objects
Intrinsic alarms are not supported by
global thermostat, but the
corresponding properties are exposed
in BACnet object. user should not
configure those properties and this will
be hidden in future release and the
point alarms must be configured using
Niagara alarm extension
NA
COVCOV not supportedThermostat does not support COV way
of notifying values to the supervisor but
the COV increment properties are
exposed in the objects. user should not
configure this property and this will be
hidden in future release.
NA
DAY LIGHT SAVINGUnable to read/write
Daylight savings from
Niagara to GT
Unable to read/write Daylight savings
from Niagara to GT
Set the daylight saving
from Thermostat HMI

Honeywell TC500A Specifications

General

Brand	Honeywell
Model	TC500A
Category	Thermostat
Language	English