Example 3: Control A Binary Output On The Tracer Mp503 From A Tracer Mp581 - Trane Tracer MP503 Installation And Operation Manual

Chapter 5 Network variable bindings
22
and humidity. Custom programming is also required to display this data
on the operator display of Tracer MP581 #2. Remember that the outside
air humidity is being transmitted over the network in units of mA. Some
custom programming is required in Tracer MP581 #2 to convert the
humidity from units of mA to units of percent (%) before performing the
enthalpy calculation.
Example 3: Control a binary output on the Tracer
MP503 from a Tracer MP581
This example shows an nvi on the Tracer MP503 being bound, which
allows a binary output on the Tracer MP503 to be controlled by another
device on the LonTalk network. In this example, binary output 1 on the
Tracer MP503 is starting and stopping an exhaust fan. The Tracer
MP503 is communicating via the LonTalk network to a Tracer MP581
that is controlling an AHU. The AHU and the exhaust fan follow the same
schedule; for example, whenever the AHU runs, the exhaust fan runs.
Bind an nvo on the Tracer MP581 to an nvi on the Tracer MP503 so the
AHU and exhaust fan run together. Figure 8 shows the LonTalk network
for this example.
Figure 8. LonTalk network for example 3
Tracer MP581 with
operator display
LonTalk link
Use the Rover service tool to create bindings. (See the Rover Operation
and Programming guide, EMTX-SVX01B-EN.) Using the Rover service
tool, select the network variable from the Tracer MP581 and then select
the Tracer MP503. The Rover service tool shows you only the variables in
the Tracer MP503 of the SNVT that matches the variable you selected in
the Tracer MP581.
Tracer MP503
®
Additional
LonTalk
devices
CNT-SVX09B-EN