Ah540/541 Network Variables - Trane Tracer AH540 Setup And Operation

Table 78. Tracer AH540/541 SCC profile network variable inputs
Variable name
nviAuxHeatEnable SNVT_switch
nviComprEnable SNVT_switch
nviEconEnable SNVT_switch
nviEmergOverride SNVT_hvac_emerg
nviHeatCool SNVT_hvac_mode
nviOAMinPos SNVT_lev_percent
nviOccManCmd SNVT_occupancy
nviOccSchedule SNVT_tod_event
nviOccSensor SNVT_occupancy
nviOutdoorTemp SNVT_temp_p
nviSetpoint SNVT_temp_p
nviSetptOffset SNVT_temp_diff_p
CNT-SVX05B-EN

AH540/541 network variables

A network variable input (nvi) receives data from other devices on the
Comm5 network. Network variable inputs (including their SNVTs) that
are commonly used are shown in Table 78 on this page and Table 79 on
page 110.
A network variable output (nvo) sends data to other devices on the
Comm5 network. Network variable outputs (including their SNVTs) that
are commonly used are shown in Table 80 on page 111 and Table 81 on
page 112.
SNVT Data type
Analog
Analog
Binary
Enumerated
Enumerated
Analog
Enumerated
Enumerated
Enumerated
Analog
Analog
Analog
AH540/541 network variables
Description
Bind to this network variable input to communicate a
mechanical heating limit to the device. The valid range
is 0% to 100% with a resolution of 0.005%.
Bind to this network variable input to communicate a
mechanical cooling limit to the device. The valid range
is 0% to 100% with a resolution of 0.005%.
Bind to this network variable input to communicate
economizer operation enable or disable to the device.
Bind to this network variable input to communicate
emergency overrides to the device.
Bind to this network variable input to communicate
the application mode to the device.
Bind to this network variable input to communicate an
outdoor air damper minimum position to the device.
The valid range is from 0% to 100% with a resolution
of 0.005%.
Bind to this network variable input to communicate
occupancy overrides to the device.
Bind to this network variable input to communicate
scheduled occupancy to the device.
Bind to this network variable input to a local occu-
pancy sensor status to the device.
Bind to this network variable input to communicate
the outdoor air temperature in degrees Celsius to the
device. The valid range is from -40°C to 100°C with a
resolution of 0.01°C.
Bind to this network variable input to communicate
the space temperature setpoint in degrees Celsius to
the device. The valid range is from 10°C to 29.44°C
with a resolution of 0.01°C.
Bind to this network variable input to communicate a
space temperature setpoint offset in degrees Celsius
to the device. The valid range is from -10°C to 10°C
with a resolution of 0.01°C.
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