EATON PowerXpert®Gateway Series 1000 Card User’s Guide S164201670 Rev 1 49
Chapter 5 Modbus Registers
This chapter describes how to address a specific Power Distribution Unit
(PDU) or Remote Power Panel (RPP), a specific panel in a PDU or RPP,
and a specific breaker in a panel using Modbus TCP/IP.
NOTE Toobtain the panel or circuit breaker data, the PDU/RPP must have the Energy
ManagementSystem (EMS)Level 3 option installed.
A PDU/RPP distributes power through one or more circuit breaker
panels. Each panel consists of several circuit breakers. Each circuit
breaker monitors more than 30 parameters, such as voltage, current,
power, and alarms. The value of each parameter is stored in a
corresponding Modbus data register.
Because there are many panels in a PDU/RPP, it is necessary to identify
a specific breaker and specify the panel containing that breaker. It is
likely that Breaker #5 in Panel #1 has different data than Breaker #5 in
Panel #7.
The tables in this chapter list the names of the PDU/RPP parameters and
their corresponding Modbus registers for:
SPDU/RPP summary data
SPanel summary data
SBreaker data
The values of the parameters can be read over an Ethernet network by
using Modbus TCP/IP building monitoring programs or Modbus TCP/IP
analyzer programs.
NOTE SomeModbus programs provide an option for zero- or one-based addressing. Select
theoption for zero-based addressing. The Modbus numbering scheme for the PDU/RPP starts
at0, so physicalcoil number 1 corresponds to Modbus register number 0, coil number 2
correspondsto Modbus register number 1, and so on.