BAS-SVP09F-EN
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Rotary Switch Values and BACnet Device ID
Rotary Switch Values
The rotary switch value is the physical address of a device on a network. It is often referred to as
the MAC address. The term is generic and is used to denote the physical address of many types
of networks.
The rotary switch value is the rotary dial address. For Trane systems, this address must be
between 1 and 127. Although “0,0,0,” is a valid BACnet address, Trane reserves this address for
the Tracer SC system controller. All devices on the BACnet MS/TP link must be unique.
BACnet Device ID
Tracer SC uses the rotary switch value to create the BACnet device ID. The Tracer SC adds an SC
rotary dial address and a link number to artificially create a unique BACnet Device ID for each
node.
The following figure shows how Tracer TU displays the rotary dial settings and the resulting
BACnet device ID:
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The rotary dials on the BCI-R are set to 30 (0,3,0), which is also the rotary switch value.
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The Tracer SC created a BACnet device ID of 101030.
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The Tracer SC address is “0,1,0”.
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The BCI-R is installed on link 1.
Figure 5. Rotary dial settings and BACnet device ID in Tracer TU
