Bacnet Objects And Network Configuration - Contemporary Controls BASstat BAST-421C-BW2 User Manual

BACnet Objects and Network Configuration

4.4
Transmission types
Physical layer: Wi-Fi 802.11 b/g/n
•
• Protocol: BACnet/IP
• UDP Port Number: BAC0 (47808)
MAC address: Wi-Fi chip MAC address found written on the back side of thermostat or in
•
Engineering Menu item (Phy3). This can assist when multiple Wi-Fi thermostats are installed.
Device Instance: 700001
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Initial Configuration
All configuration parameters are settable through use of the buttons on thermostat by entering the
Engineer Menu, or once installed on the BACnet network, configuration can also be altered using
BACnet commands. Network command-based configuration can also be accomplished using a Wi-Fi
enabled laptop/computer/tablet/smart phone and Contemporary Controls' free
Wi-Fi Communication Configuration
Overview
The BAST-421C-BW2 Wi-Fi thermostat is preconfigured with a BACnet Device Instance of 700001 and
a UDP Port Number of 47808 (decimal) equivalent to BAC0 (hexadecimal).
Addressing
A unique Device Instance Number throughout the entire BACnet internetwork is required to distinguish
the device from all other BACnet devices. When more than one BASstat is installed at the same time,
their Device Instance Number must be configured prior to connecting to the BACnet/IP network or
BACnet communication will fail due to duplicate device instances.
Device instance can be modified in Engineering Menu items (dEVH) – high bytes and (dEVL) – low
bytes. Device Instance = (dEVH)*1000+(dEVL). Device Instance example: if (dEVH) is set to 4194 and
(dEVL) is set to 7, Device Instance Number = 4194007. Device Instance Number can also be changed
by writing to BACnet object [AV21] Device Instance once the thermostat is online. The BACnet UDP
Port Number can be configured in Engineering Menu item (UdP).
BACnet/IP Wi-Fi (BW2) model will initially boot up as a Wi-Fi Access Point to allow for IP configuration.
This requires connecting to the thermostat as an access point for initial configuration using a Wi-Fi
enabled laptop/computer/tablet/smart phone. Look for the BAST-421C-BW2 with its unique SSID of
"WiFi-788C-xxxx" and no access point passphrase by default (simply click to connect to Access Point).
The digits "xxxx" in "788C-xxxx" are the last 4 digits of the thermostat's Wi-Fi chip MAC address found
written on the back side of the Wi-Fi module.
This ensures a unique SSID for discovery and configuration and it can assist in identification of
thermostats when multiple Wi-Fi stats are installed on the same site (unique identifier outlined in blue in
the image below). This unique identifier can also be viewed in Engineering Menu item (Phy3).
UM-15093500-AA1
BACnet Discovery Tool.
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