Echelon IzoT BACnet Developes Manual de usuario

078-0507-01ADevelop BACnet applications using the FT 6000 EVKand the FT 6050 Smart Transceiver. IzoT BACnet Developer’s Guide

For example, in Figure 1 there is a nviSpaceTemp that is normally connected to some other nvo output from another device. If a BACnet Client is requ

This is best understood by examining a LONWORKS nvi (in Figure 2), in particular nviSpaceTemp, based on the LONMARK VAV Functional Profile. In the VA

BACnet Interface Overview The following figure depicts the BACnet interface. FT 6000 Ba sed LonWorks DeviceLon Application( User Code)Lon Network V

BACnet messages that do affect the Network Variables are routed via the Mapping Functions, and then back to the LonTalk stack, where they are present

The modified or unmodified message is passed back to the LonTalk stack for further processing as normal at this point (3). Data Flow during a LO

BACnet Object to LONMARK SNVT Mapping – The “Mapping Table” 1. Network Variables The first issue is that SNVTs are “Structures” and BACnet objects

Device ID and Device Name The Object ID of the BACnet Device Object (“Device ID”) is required to be unique “Internetwork Wide”, as is the Object Name

Refer to the sample source code, in particular BACsimple.nc to see how this is used. 3. BAClon\mapping.nc a. This file contains the actual mapping

Complex Mapping If a Network Variable has multiple fields, each field needs to be mapped to a separate BACnet Object. mapAnaToSNVT_hvac_overid__per

2. 3rd party BACnet Clients – of course, any BACnet Client, in theory, should be able to read all BACnet points served by the BACnet stack. 3.

Echelon, LON, LonWorks, Neuron, 3120, 3150, Digital Home, i.LON, FTXL, LonScanner, LonSupport, LNS, LonMaker, LonMark, LonPoint, LonTalk, NodeBuilder

20 Using BACnet

Appendix A Glossary This appendix provides definitions for terms discussed in this manual. Using BACnet and LONWORKS with the FT 6000 EVK 21

Application Device A LONWORKS device that runs an ISO/IEC 14908-1 application (OSI Layer 7). The application may run on a Neuron Chip or Smart T

Configuration Properties (CPs) Configuration properties are data values that define the behavior of an application device by determining the manner i

Device A device that communicates on a LONWORKS network using CNP. A device may be an application device, network service device, or a router. Devi

Functional Block Array A set of identical functional blocks. A functional block array is useful if your device contains two or more identical switch

OpenLNS Server Computer A computer running the OpenLNS Server software. The OpenLNS Server computer contains the OpenLNS global database, which incl

Managed Network A network where a shared network management server, such as LNS, is used to perform network installation. Mandatory Network Variable/

Neuron Firmware A complete operating system including an implementation of the ISO/IEC 14908-1 protocol used by a Neuron Chip or Smart Transceiver.

Priority Array BACnet Outputs are never directly written to (*). A write is achieved by writing to the Present Value with a priority of 1 to 16. (Wit

Contents Getting Started with BACnet ... 4 Hardware Requirements ...

Service Button A push button or other actuator on a LONWORKS device that is used during installation to acquire the device’s Neuron ID. For a Neuron

User-defined Functional Profile A non-standard functional profile defined by a device manufacturer. A user-defined functional profile should be used

1 Getting Started with BACnet This chapter provides the information to get started with BACnet on the IzoT network. 4 Getting Started with BACnet

Hardware Requirements The following hardware is required to develop and test a BACnet application on the FT 6050 • IzoT Router – required to transla

user to match the requirements of their site through most standard BACnet Workstations, including the BACnet Browser for IzoT. To do so, right click

2 Using BACnet This chapter explains the BACnet terminology and illustrates the differences between BACnet and LONWORKS. Using BACnet and LONWORK

BACnet Terminology The following terms are a brief summary of BACnet terminology. BACnet Network – A group of BACnet Devices on a single network, wh

Differences between BACnet and LONWORKS There is a fundamental difference between BACnet and LONWORKS “Input” and “Output” concepts pertaining to phy