Applications Guide Tracer Graphical Programming - Trane

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Writing the communications program
Figure 178: Communications program properties
Use Network Variable Output blocks to transmit the space, discharge air,
and mixed air temperatures through the SCC Profile (Figure 179). The
Network Variable Output block works just like the Network Variable
Input block, but it transmits information on the Comm5 network instead
of receiving it. Be sure to specify the units in which the Network Variable
Output block receives the data from the program using the properties dialog
box for the block.
Figure 179: Transmitting temperatures
Transmit the effective setpoint. Remember, the effective setpoint may
vary depending on the heat/cool mode and occupancy. So, incorporate the
necessary logic to determine the appropriate setpoint to send. The SCC
profile provides a variable, nviEffectSetpt. Use a Switch block to select
the appropriate effective setpoint, cooling or heating, based on the
heat/cool mode (Figure 180 on page 220).
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