Echelon IzoT BACnet Developes - Manual (Page 3)

Contents
Getting Started with BACnet ........................................................... 4
Hardware Requirements ............................................................................... 5
Compiling the BACnet Sample Projects ................................................ 5
Using BACnet ...................................................................................... 7
BACnet Terminology...................................................................................... 8
Differences between BACnet and LONWORKS .......................................... 9
BACnet Read Operations ...................................................................... 10
Write Operation Resolution .................................................................. 10
BACnet Interface Overview .................................................................. 12
Data Flow during a LONWORKS Write to a Network Variable ........ 13
Data Flow during a LONWORKS Read of a Network Variable ......... 14
Data Flow during an outgoing Network Variable Update .................. 14
Data Flow during a BACnet Write to a BACnet Object ...................... 14
Data Types and BACnet to Lon Mapping ............................................ 14
BACnet Instance Numbering ............................................................... 14
BACnet Object to LONMARK SNVT Mapping – The “Mapping Table”15
BACnet Object Properties ..................................................................... 15
Device ID and Device Name ................................................................. 16
Mapping Table Structure ...................................................................... 16
Requirements to add the BACnet Stack to a FT 6050 application ........... 16
Mapping BACnet Objects to Network Variables ....................................... 17
Mapping BACnet Objects to non-Network Variables ................................ 17
Complex Mapping ........................................................................................ 18
Mapping UNVTs .................................................................................... 18
Device Object Instance and Name .............................................................. 18
BACnet Test Tools ....................................................................................... 18
Appendix A Glossary ....................................................................... 21
Using BACnet and LONWORKS with the FT 6000 EVK 3