User Manual

Overview
BACnet
6
Siemens Industry, Inc.
Application Note, App 14900
140-1231
2020-02-11
Overview
In Application 14900, the controller controls multiple compressors for cooling, and a
multiple-stage heater for heating. This unit may be equipped with electric heat or a
fossil fuel furnace. Typically, this US Room Temperature Unit (RTU) application fits
most five-wire thermostats on the market.
Secondary features include: Demand Ventilation Control, Occupancy indication,
Economizer Enabling, and Humidification/Dehumidification Enabling a call for external
equipment to energize.
Figure 1: Hardware Diagram.
BACnet
The thermostat communicates on industry-standard BACnet MS/TP networks.
NOTE:
Bold, mixed case names = Exposed BACnet objects
All caps names = Internal variables that cannot be accessed through BACnet
Table 1: BIBB
Product
Supported BIBBs
BIBB Name
RDY2000BN
DS-RP-B
Data Sharing - Read Property-B
DS-RPM-B
Data Sharing - Read Property Multiple-B
DS-WP-B
Data Sharing - Write Property-B
DS-WPM-B
Data Sharing – Write Property Multiple - B
DS-COV-B
Data Sharing – Change of Value - B
SCHED-WS-I-B
Scheduling – Weekly Schedule Internal - B
DM-DDB-B
Device Management - Dynamic Device Binding-B
DM-DOB-B
Device Management - Dynamic Object Binding-B
DM-DCC-B
Device Management - Device Communication Control-B
DM–PT–B
Device Management – Private Transfer - B