Chapter 5 Network variable bindings
20 CNT-SVX09B-EN
Table 3 shows the bindings needed.
Once you have completed the bindings, you need to program the Tracer
MP581 to display this data on the operator display. Remember that the
outside air humidity is being transmitted over the network in units of
mA. Some custom programming is required in the Tracer MP581 to con-
vert the humidity from units of mA to units of percent (%). Custom pro-
gramming in the Tracer MP581 will also use the outside air temperature
and humidity to calculate the outside air enthalpy and use it to control
the economizer of the AHU.
Table 3. Bindings for example 1
Network variable output on the
Tracer MP503
Network variable input on
the Tracer MP581
nvoTemperature1 binds to
nviTemp01
1
nvoCurrent2 binds to
nviCurrent_mA01
2
nvoBIP3Status binds to
nviSwitch01
3
nvoBIP4Status binds to
nviSwitch01
3
1
The Tracer MP581 has 40 generic temperature (SNVT_temp_p) network variable
inputs available for binding (nviTemp01 through nviTemp40).
2
The Tracer MP581 has 8 generic current (SNVT_amp_mil) network variable inputs
available for binding (nviCurrent_mA01 through nviCurrent_mA08).
3
The Tracer MP581 has 40 generic binary (SNVT_switch) network variable inputs
available for binding (nviSwitch01 through nviSwitch40).
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