Trane BACnet MS/TP - Setting Rotary Addresses on the Tracer SC+ System Controller; Bacnet MS;TP Device ID Assignment; Device ID Assignment for Bacnet IP Devices

BAS-SVX51L-EN 17
Best Practices
Setting Rotary Addresses on the Tracer
®
SC+ System Controller
The Tracer
®
SC+ has a set of three rotary switches on the front of the device, which are used to set the
BACnet
®
Device ID. The rotary switch range is 1 to 419. Zero (0) cannot be used because it is the default
value assigned to the device at the factory.
Note: If you set the rotary switch values to a number between 001 and 419, the Tracer
®
SC+ device ID
and the BACnet
®
MS/TP numbers will be calculated from that number.
To set the rotary switch values, use a small screwdriver to turn the three rotary switches on the Tracer
®
SC+ to a unique number between 001 and 419.
BACnet
®
MS/TP Device ID Assignment
Each unit controller must have a unique BACnet
®
device ID. Tracer
®
SC+ automates the process by
calculating a unique device ID for each unit controller and then saving the device ID to memory in each
device.
For Tracer
®
SC and SC+ prior to version 5.4, BACnet
®
MS/TP device IDs are calculated using the
following three sets of values:
• The Tracer
®
SC+ rotary switch value (1 to 419).
• The Tracer
®
SC+ BACnet MS/TP link number (1 to 2).
• The unit controller rotary switch value (1 to 127).
The three values are joined together to form the BACnet
®
device ID for the unit controller.
The following example in Table 2 illustrates this process.
For Tracer
®
SC+ version 5.4 and higher, BACnet
®
MS/TP device IDs are calculated using only two sets
of values:
• The network number.
• The unit controller 3 digit rotary switch.
Device ID Assignment for BACnet IP Devices
For devices connecting over BACnet
®
IP, Tracer
®
SC+ calculates the device ID using the following:
• The BACnet
®
network number for Ethernet 1. (This number can be changed by the user).
• The unit controller rotary switch value. (The Tracer
®
SC rotary address is not used to calculate
BACnet
®
IP device IDs).
The following example in Table 3 illustrates this process using a Tracer
®
UC600 controller.
Table 2. Calculating the BACnet
®
device ID
Tracer
®
SC+ rotary switch value (21) 0 2 1
Tracer
®
SC+ BACnet
®
MS/TP link number (1) 1
Unit controller rotary switch value (38) 0 3 8
BACnet
®
Device ID: 211038 0 2 1 1 0 3 8
Table 3. Calculating the BACnet
®
IP device ID
BACnet
®
network number Eth port 1 (1) 1
Unit controller rotary address (42) 0 4 2
BACnet
®
IP Device ID: 01042 0 1 0 4 2