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Hexadecimal
Address (PS3)
00
01-F7
FF
N/A
A
DDRESSING AN
The PowerScout 3 Plus has only one element, whereas the PowerScout 24 has eight. Modbus and
BACnet each use different ways to designate an element on the PS24.
In Modbus mode, the decimal network switches set the base address for metering element "A."
Metering elements "B" through "H" will always have a Modbus address that is one higher than the
element before. For example, if the rotary address switches are set to 001 then metering element "A"
register values will be accessed at Modbus address 001, element "B" registers will be accessed at
Modbus address 002, element "C" at address 003, and so on.
In BACnet mode, elements are incrementally (in alphabetic order) designated by adding 20000 to an
object value. So, Element A = Base object number zero, Element B = Base object number zero + 20000,
Element C = Base object number zero + 40000, and so forth. Thus, to reference object 15010 to
Element E, write 95010 (15010 + 80000).
PS24 Element
A
B
C
D
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Decimal Address
(PS24)
Reserved for resetting the PowerScout to Modbus mode with 9600 baud,
000
8 bit, 1 stop bit and no parity.
001-239
Available for Modbus slave devices.
Reserved for network wide broadcast.
The rotary switches can be used to configure the communication protocol
255
to BACnet or Modbus as well as changing the baud rate if unsure of the
current settings (PS3 only).
Reserved for communication protocol settings. The rotary switches can
999
be used to configure the communication protocol to BACnet or Modbus
as well as changing the baud rate if unsure of the current settings.
Table III-2: Modbus Hexadecimal/Decimal Address Availability
E
LEMENT
BACnet Designation
0 (Base Object)
Base Object + 20000
Base Object + 40000
Base Object + 60000
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Modbus Address Availability
PS24 Element
E
F
G
H
34
BACnet Designation
Base Object + 80000
Base Object + 100000
Base Object + 120000
Base Object + 140000
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