Network Configurations - Honeywell T7350 System Engineering

NETWORK CONFIGURATIONS

The T7350H can be configured to perform a variety of
activities in which data is sent to and/or received from other
®
nodes on the L W
ON ORKS
shared with other network devices includes:
— Current year, month, day, hour, minute, second.
— System mode (HEAT, COOL, AUTO, OFF, EM HEAT).
— Current fan setting (ON, AUTO).
— Space temperature.
— Space relative humidity.
— Discharge air temperature.
— Outdoor air temperature.
— Occupancy sensor status.
— Terminal load.
— Current setpoint.
— Occupied/Unoccupied schedule commands.
— Current occupancy status.
— Occupancy schedule including current occupancy state,
next state and time in minutes until next scheduled
change of occupancy state.
— Relay status (heat/cool stages and fan).
— Alarm status.
— Alarm log including the last five alarms.
— Device Error status.
— Bypass state (multiple XL10 devices follow the bypass
operation of a master device).
A network configuration tool is used to configure the T7350H
Thermostats and other nodes with which the T7350H
interacts. The following is a brief description of the
configurable features that can be commanded over the
network:
• Time Master:
When a T7350H is designated as the network time master,
the current time of day and date is synchronized across the
network every minute. The L
Screen can be used to configure a T7350H as the Network
Time Master. Whenever the time of day or date of the time
master is changed, it automatically adjusts all the other
network devices (T7350H, Q7300 & XL15A) bound to the
time master. When a T7350H is controlled by a time
master, the local day light saving schedule is disabled. The
Day Light Saving option on all time master recipients
should be disabled. This prevents erroneous time changes
(local daylight savings switchover) during temporary
network outages.
Source
T7350H.nvoTime
or
XL15a.nvoTimeOut
Q7300.nvoTime
• Time Schedule:
The occupancy schedule used by a T7350H may reside
locally in that device or remotely in another schedule
device (T7350H, XL15a, XL15b or T7300/Q7300). Local
schedules can be created and modified using the T7350H
keypad, a direct connected PDA, a network connected
configuration tool (L S
ON
External schedules can also be modified using the keypad
of the master schedule device, or with a network
connected configuration tool or Workstation. When a
T7350H receives scheduling information over the network,
network. Information that can be
S ™ T7350H General
ON PEC
Destination
T7350H.nviTimeSet
or
XL15a.nviTimeIn
Q7300.nviTime
™) or Command Display.
PEC
T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT
the user is not prevented from making local schedule
changes at the recipient thermostat. Local schedule
changes (at a recipient device) have no effect on the
scheduling commands received from the master device.
When a T7350H is designated as a master schedule
device, it sends its schedule information (current state,
next state, time until next change of state) to the
appropriate T7350H(s) which, in turn, overrides any
existing internal time schedule. The T7350H Thermostat
can provide master scheduling information to multiple
Excel 10 devices. One T7350H shares the schedule
information (current state, next state, time until next
change of state) with the designated Excel 10 devices.
Source
T7350H.nvoOccSchedule
or
XL15a.nvoTodEventCmd[i]
Q7300.nvoOccSchedulei
• System Mode Settings:
System mode settings (HEAT, COOL, AUTO, OFF, EM
HEAT) can be commanded by a remote T7350H or other
compatible XL10 device. A one to many network binding
can be used to command multiple devices from a single
unit. In addition, a network connected Workstation can be
used to change the System Mode.
Command Source
T7350H.nvoHeatCool
or Workstation
• Fan Settings:
Fan settings (ON, AUTO) can be changed from a network
connected Workstation.
Source
Workstation
or Network Tool
• Outdoor Air Temperature Sharing:
If a valid outdoor air temperature value is received at the
T7350H OAT network variable input, that value will be used
in the T7350H. The local OAT sensor of the T7350H is
ignored until the network sensor fails.
Source
T7350H.nviOutdoorTemp
or
XL10.nvoOdTemp
XL15c.nvoOdTemp
• Discharge Air Temperature Sharing:
The discharge air temperature value can be shared with
other devices on the network. Note that the T7350H does
not accept a network discharge air temperature input.
Source
T7350H.nvoDischAirTemp
• Space Temperature Sharing:
If a valid space temperature value is received at the
T7350H Space Temperature network variable input, that
9
Destination
T7350H.nviOccSchedule
or
XL10.nviTodEvent
XL15c.nviTodEventIn[i]
Command Destination
T7350H.nviApplicMode
Destination
T7350H.nviFanAuto
Destination
T7350H.nvoOutdoorTemp
or
XL10.nviOdTemp
XL15c.nviOdTemp
Destination
XL15c.nviDATemp
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