Chapter 8 Network variable bindings

UUKL binding list (automatic self-test trigger and status)

Table 37 shows an example list of actuator failure status bindings. Only dedicated smoke control systems require a scheduled self-testing. Once the self-test is triggered, a status signal is sent to the panel trouble LED to blink.

Table 37. Actuator failure status bindings

Function

Originator

Network variable

Destination

 

 

 

 

systemSelfTest

MP580-2

nvoSwitch13

Mechanical system/nviSwitch36

 

 

 

 

selfTestEnable

Mechanical system

nvoSwitch04

MP580-2/nviSwitch05

 

 

 

 

Custom binding report

It is strongly recommended that a custom binding report be done during and at the end of each custom binding session. The *.csv (comma separated variables) is the most useful type for this report. It can easily be opened as a spreadsheet and formatted. If it is necessary to repair the custom bindings later, this file can be used as a resource to recreate the custom bindings.

Understanding bindings

Network variable (NV) bindings provide a valuable way to share data on a LonTalk® link, but there are some limitations to keep in mind during the system design process. This section will help you understand the essential concepts involved in bindings, as well as their limitations.

The Echelon Corporation, the company that created LonWorks® and the LonTalk protocol, refers to bindings as connections. Echelon defines connections as “the implicit addressing established during binding. A connection links one or more logical outputs, network variables, to one or more logical inputs.”

Bindings provide a very efficient way to communicate. Data updates are sent from the output NV(s) to the input NV(s) only when necessary. When they are sent, they get to their destination quickly—typically, in less than a half-second.

An update to an output NV occurs when either of the following occur:

•A binary value changes state

•An analog value changes by more than a pre-programmed delta value

•A heartbeat timer expires

This peer-to-peer event-driven communications model often provides better performance than a master-slave and/or scan-type communications model. It is one of the key advantages of LonTalk.

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BAS-APG001-EN

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Trane BAS-APG001-EN manual Understanding bindings, Uukl binding list automatic self-test trigger and status
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BAS-APG001-EN, Engineered Smoke Control System for Tracer Summit specifications

The Trane Engineered Smoke Control System is an advanced solution designed to enhance safety and efficiency in buildings by effectively managing smoke during emergency situations. Specifically tailored for integration with the Tracer Summit Building Automation System, the Trane Engineered Smoke Control System (BAS-APG001-EN) combines cutting-edge technologies with user-friendly features, empowering facility managers to maintain optimal air quality and ensure occupant safety.

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