Taco VT7355C5x21E, VT7350C5x21E, VT7300, VT7300C5x21E, VT7300A5x21E Integration Manual
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Integration Manual
VT7300 Series Thermostats
102-221
SUPERSEDES: New EFFECTIVE: November 1, 2008
LonWorks Integration Manual
PIR Ready VT7300 Series
24 Vac Low Voltage Fan Coil Thermostats
For Commercial and Lodging HVAC Applications
Product Overview
The VT7300 PI thermostat family is specifically designed for fan coil control. The
product features a backlit LCD display with dedicated function menu buttons for simple
operation. Accurate temperature control is achieved due to the product’s PI
proportional control algorithm, which virtually eliminates temperature offset associated
with traditional, differential-based thermostats.
Models are available for On/Off, 3 point floating and analog 0 to 10 Vdc control.
All models contain can control three, two or single fan speed. 3 additional inputs are
also provided for monitoring and / or various advanced functions.
All models feature configurable System and Fan button functions to meet all possible
applications. They all contain an SPST auxiliary switch that can be used to control
lighting or auxiliary reheat.
The thermostats are also compatible with the new TACO PIR cover accessories. Thermostats equipped with a PIR cover
provide advanced active occupancy logic, which will automatically switch occupancy levels from Occupied to Stand-By
and Unoccupied as required by local activity being present or not. This advanced occupancy functionality provides
advantageous energy savings during occupied hours without sacrificing occupant comfort. All thermostats can be ordered
with or without a factory installed PIR cover (see notes below ).
The additional following documents are available at: www.taco-hvac.com
• PIR application information and examples, are available on document: PIR Application Guide 102-354
• PIR cover installation information is available on document: PIR Cover Install Guide 102-355
• Detailed information on the thermostat (VT73xxX5x21x), is available on document:102-220
Contents
• Thermostat Objects
• SNVTs and SCPTs Table Per Model
• Input Network Variables (nvi’s) Description
• Output Network Variables (nvo’s) Description
• Configuration Properties (nci’s) Description
• Integration - Global Commands
• Integration - Graphic User Interface (GUI) Objects
• Integration - Configuration Objects
• Wiring Guide
Overview
Network Configuration
Maximum Number Of Devices
Maximum Cable Length
EI-485 Repeaters
Terminators
• Network Adapter
• Software Files
• RoHS and Non-RoSH APB and NXE Files
• Device Identification
• Tips And Things You Need To Know
• Troubleshooting Section
• Document Control
2
Thermostat Objects
VT7300 Space Comfort Controller
Object Type #8500
nviSpaceTemp
SNVT_temp_p
nviOutdoorTemp
SNVT_temp_p
nviSetpoint
SNVT_temp_p
nviSpaceRH
SNVT_lev_percent
nviFanSpeedCmd
SNVT_switch
nviAuxHeatEnable
SNVT_switch
nviOccManCmd
SNVT_occupancy
nviApplicMode
SNVT_hvac_mode
nviHeatCool
SNVT_hvac_mode
Mandatory
Network
Variables
Optional
Network
Variables
nvoSpaceTemp
SNVT_temp_p
nvoUnitStatus
SNVT_hvac_status
nvoDischAirTemp
SNVT_temp_p
nvoSpaceRH
SNVT_lev_percent
nvoEffectOccup
SNVT_occupancy
nvoTerminalLoad
SNVT_lev_percent
nviRemLockout
SNVT_count
nviDhumidLCK
SNVT_switch
nviAuxOut
SNVT_switch
Configuration Properties
Send Heartbeat (mandatory)
Temperature Setpoints (mandatory)
Minimum Send Time (optional)
Receive Heartbeat (optional)
Manufacturer
Network
Variables
Manufacturer Configuration Properties
Please see the manual for details.
Plug-In for configuration provided.
nvoSCCstatus
SNVT_state_64
3
SNVTs
1
and SCPTs2 Table Per Model
Model Number
VT7300F5x21E
VT7300A5x21E
VT7300C5x21E
VT7350C5x21E
VT7305A5x21E
VT7305C5x21E
VT7355C5x21E
Point Name
No
Sub
N/A: Not applicable on this model
0 nviSpaceTemp XXXXXXXXXXX
1 nviOutdoorTemp XXXXXXXXXXX
2 nviSetpoint XXXXXXXXXXX
3 nviSpaceRH N/A N/A X N/A N/A X N/A X N/A X N/A
4 nviFanSpeedCmd XXXXXXXXXXX
5 nviAuxHeatEnable XXXXXXXXXXX
6 nviOccManCmd XXXXXXXXXXX
7 nviApplicMode XXXXXXXXXXX
8 nviHeatCool XXXXXXXXXXX
9 nviRemLockout XXXXXXXXXXX
10 nviDhumiLCK N/A N/A X N/A N/A X N/A X N/A X N/A
11 nviAuxOut XXXXXXXXXXX
12 nvoSpaceTemp XXXXXXXXXXX
13 nvoDischAirTemp XXXXXXXXXXX
14 nvoSpaceRH N/A N/A X N/A N/A X N/A X N/A X N/A
15 nvoEffectOccup XXXXXXXXXXX
16 nvoUnitStatus X X X X X X X X X X X
1 mode xxxxxxxxxxx
2 heat_output_primary x x xxxxxxxxx
4 cool_output x x xxxxxxxxx
6 fan_output x x xxxxxxxxx
7 in_alarm x x xxxxxxxxx
17 nvoSccStatus X X X X X X X X X X X
1 StateTerminal BO2 x x xxxxN/AN/AN/AN/AN/A
2 StateTerminal BO1 N/A x x N/A x x N/A N/A N/A N/A N/A
3 StateTerminal BO4 N/A x x N/A x x N/A N/A N/A N/A N/A
4 StateTerminal BO3 x x xxxxN/AN/AN/AN/AN/A
5 StateTerminal BO5 x x xxxxxxxxx
6 FanLow x x xxxxxxxxN/A
7 FanMed xxxxxxxxxxN/A
8 FanHigh x x xxxxxxxxx
9 UI 3 Status xxxxxxxxxxx
10 BI 2 Status xxxxxxxxxxx
11 BI1 Status xxxxxxxxxxx
12 Local PIR Motion xxxxxxxxxxx
13 Service Alarm xxxxxxxxxxx
14 Filter Alarm xxxxxxxxxxx
15 Window Opened x x xxxxxxxxx
16 Dehumidification Active N/A N/A x N/A N/A x N/A x N/A x N/A
18 nvoTerminalLoad X X X X X X X X X X X
1: SNVTs: Standard Network Variables Types
2: SCPTs: Standard Configuration Parameters Types
VT7350F5x21E
VT7305F5x21E
VT7355F5x21E
VT7300M5x21E
4
Model Number
VT7300F5x21E
VT7350F5x21E
VT7305F5x21E
VT7300C5x21E
VT7300A5x21E
VT7305A5x21E
VT7350C5x21E
VT7305C5x21E
VT7355C5x21E
Point Name
No
Sub
N/A: Not applicable on this model
19 nciSetpoints X X X X X X X X X X X
1 occupied_cool xxxxxxxxxxx
2 standby_cool xxxxxxxxxxx
3 unoccupied_cool xxxxxxxxxxx
4 occupied_heat xxxxxxxxxxx
5 standby_heat xxxxxxxxxxx
6 unoccupied_heat xxxxxxxxxxx
20 nciRHmodel N/A N/A X N/A N/A X N/A X N/A X N/A
1 RHdisplay N/A N/A x N/A N/A x N/A x N/A x N/A
2 RHsetpoint N/A N/A x N/A N/A x N/A x N/A x N/A
3 DehumHyst N/A N/A x N/A N/A x N/A x N/A x N/A
4 DehumCool N/A N/A x N/A N/A x N/A x N/A x N/A
5 RHcalib N/A N/A x N/A N/A x N/A x N/A x N/A
21 nciGenOpt X X X X X X X X X X X
1 Control Type N/A x x N/A x x N/A N/A N/A N/A N/A
2 Drive Time xxxxxxN/AN/AN/AN/AN/A
3 Cycles Per Hour x x xxxxN/AN/AN/AN/AN/A
4 Reverse Acting Output N/A N/A N/A N/A N/A N/A x x x x x
5 BI1 xxxxxxxxxxx
6 BI2 xxxxxxxxxxx
7 UI3 xxxxxxxxxxx
8 Menu Scroll x x xxxxxxxxx
9 Auto Mode xxxxxxxxxxN/A
10 Temperature Scale xxxxxxxxxxx
11 Pipes # Main out config x x xxxxxxxxx
12 Sequence of Operation x x xxxxxxxxN/A
13 Fan Menu Sequence x x xxxxxxxxN/A
14 Heat Maximum setpoint x x xxxxxxxxx
15 Cool Minimum setpoint x x xxxxxxxxx
16 SetpointType x x xxxxxxxxx
17 Temporary Occ Time xxxxxxxxxxx
18 Deadband x x xxxxxxxxx
19 Calibration Room Sensor x x xxxxxxxxx
20 Auxiliary Contact Config x x xxxxxxxxx
21 Reheat Time Base x x xxxxxxxxx
22 Fan Mode xxxxxxxxxxx
23 PIR Stand-By Timer x x xxxxxxxxx
24 PIR Unoccupied Timer x x xxxxxxxxx
22 nciSccModel X X X X X X X X X X X
1 Thermostat Model x x xxxxxxxxx
2 Software Version xxxxxxxxxxx
23 nciHvacType XXXXXXXXXXX
24 nciSndHrtBt XXXXXXXXXXX
25 nciMinOuttM XXXXXXXXXXX
26 nciRcvHrtBt XXXXXXXXXXX
27 nciMajVer XXXXXXXXXXX
28 nciMinVer XXXXXXXXXXX
VT7355F5x21E
VT7300M5x21E
5
Input Network Variables (nvi’s) Description
Parameter Variable Name Function
Room
Temperature
network input
SNVT_temp_p
nviSpaceTemp
This input network variable provides a network remote temperature
value to the thermostat. When linked of written to, the internal
temperature reading (internal sensor) is no longer used.
Valid Range: 40 to 122°F (-40 to 50°C)
Default Null (release) Value: 621.81°F (327.67°C or 0x7FFF)
This network variable is subject to the Receive HeartBeat Time,
nviRcvHrtBt.
Outdoor Air
Temperature
network input
SNVT_temp_p
nviOutdoorTemp
This input network variable provides outdoor air temperature
information to the thermostat from a network value temperature
value. The device will automatically display the value on its display
when linked.
Valid Range: 40 to 122°F (-40 to 50°C)
Default Null (release) Value: 621.81°F (327.67°C or 0x7FFF)
Occupied
Cool & Heat
Setpoints
network Input
SNVT_temp_p
nviSetpoint
This input network variable is used to allow the occupied
temperature setpoints only to be changed via the network from a
single analog value. (Note: the Stand-By and Unoccupied setpoints
are not changed). The corresponding heating and cooling values
are derived from the minimum deadband configuration value
Default Null Value: 621.81°F (327.67°C or 0x7FFF)
Ex. If the minimum deadband configuration value = 2 °F and
nviSetpoint = 70°F.
• The resulting Occupied heating setpoint will equal 69 °F which is
derived from 70 °F minus _ the minimum deadband configuration
value of 2 °F
• The resulting Occupied cooling setpoint will equal 71 °F which is
derived from 70 °F plus _ the minimum deadband configuration
value of 2 °F
Room
Humidity
network input
SNVT_lev_percent
nviSpaceRH
This input network variable is the measured room humidity in
percent monitored by the thermostat.
Valid Range: 5 to 90%
Default Null Value: +163.835 (0x7FFF)
This network variable is subject to the Receive HeartBeat Time,
nviRcvHrtBt
6
Parameter Variable Name Function
Fan Mode network input
SNVT_switch
nviFanSpeedCmd
This input network variable is used to connect an external fan
speed switch to the node or to allow any supervisory device to
override the fan speed controlled by the node’s control algorithm.
This input is used in conjunction with FanMenu bit in nciGenOpts.
Default Null Value: AUTO (state = 0xFF)
Valid Range:
Fan
Menu
Value
State Value Equivalent
Percent
Requested Speed
Sequence of
Operation
network input
SNVT_switch
nviAuxHeatEnable
0
0
1
1
1
1
1
N/A N/A Off - Not Used
0 0% Off - Not Used
1 to 66 0.5 to 33% Low
67 to 133 33.5 to 66.5% Medium
134 to 200 67 to 100% High
201 to 255 100% 3 – Not Used
0xFF N/A N/A Auto – Not Used
1
0 n/ N/A Off – Not Used
1 0 0% Off – Not Used
1 0 to 100 0.5 to 50% Low
1 101 to 200 50.5 to 100% High
1 201 to 255 100% 2 – Not Used
0xFF N/A N/A Auto – Not Used
2
0 N/A N/A Off - Not Used
1 0 0% Off - Not Used
1 1 to 66 0.5 to 33% Low
1 67 to 133 33.5 to 66.5% Medium
1 134 to 200 67 to 100% High
1 201 to 255 100% 3 – Not Used
0xFF N/A N/A Auto
3
0 n/ N/A Off – Not Used
1 0 0% Off – Not Used
1 0 to 100 0.5 to 50% Low
1 101 to 200 50.5 to 100% High
1 201 to 255 100% 2 – Not Used
0xFF N/A N/A Auto
4
0 n/ N/A Off – Not Used
1 0 0% Off – Not Used
1 1 to 200 0.5 to 100% On (High)
1 201 to 255 100% On – Not Used
0xFF N/A N/A Auto
This input network variable is used to enable or disable the
1
auxiliary heat stage.
This input is used in conjunction with nviHeatCool and SeqOper.
Default Null Value: AUTO (state = 0xFF)
Set value to 100% for both On & Off state
Valid Range:
See note 1 below
State Value Auxiliary Heat Operation
0 N/A Disabled – Not Used
1 0 % Disabled
1 1 to 99% Partially Enabled – Not Used
1 100% Enabled
0xFF N/A Enabled (invalid)
7
Parameter Variable Name Function
Occupancy network input
SNVT_occupancy
nviOccManCmd
This input network variable is used to command the Space
Comfort Controller into different occupancy modes. It is typically
set by a supervisory node to remotely control the occupancy
modes to override the local occupancy routines of the thermostat.
Default Null Value: OC_NUL = 0xFF
Valid Range:
System Mode network input
SNVT_hvac_mode
nviApplicMode
This network variable input is used to coordinate the Space
Comfort Controller with any node that may need to control the
heat/cool changeover of the unit.
This input is used in conjunction with nviHeatCool and SeqOper.
Default Null Value: HVAC_AUTO.
This network variable is subject to the receive heartbeat time,
nciRcvHrtBt
Valid Range:
0 = OC_OCCUPIED *
1 = OC_UNOCCUPIED )
2 = OC_BYPASS – Not Used
3 = OC_STANDY – Not Used
0xFF = OC_NUL (Release to internal occupancy)**
* OC_OCCUPIED and OC_UNOCCUPIED commands will
always have full authority over the local occupancy routines
of the thermostat may they be a local input or a PIR cover.
** OC_NUL command will release the thermostat to use its
own internal occupancy routine driven from one of the digital
input or a PIR cover installed on board.
0 = HVAC_AUTO
1 = HVAC_HEAT
2 = HVAC_MRNG_WRMUP – Not Used
3 = HVAC_COOL
4 = HVAC_NIGHT_PURGE – Not Used
5 = HVAC_PRE_COOL – Not Used
6 = HVAC_OFF
7 = HVAC_TEST – Not Used
8 = HVAC_EMERG_HEAT – Not Used
9 = HVAC_FAN_ONLY – Not Used
12 = HVAC_MAX_HEAT – Not Used
13 = HVAC_ECONOMY – Not Used
14 = HVAC_DEHUMID – Not Used)
15 = HVAC_CALIBRATE – Not Used)
0xFF = HVAC_NUL – Not Used
8
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