Eaton Electrical 1000 - Manual (Page 53)

EATON Power Xpert ® Gateway Series 1000 Card User’s Guide S 164201670 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 To obtain the panel or circuit breaker data, the PDU/RPP must have the Energy
Management System (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:
S
PDU/RPP summary data
S
Panel summary data
S
Breaker 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 Some Modbus programs provide an option for zero- or one-based addressing. Select
the option for zero-based addressing. The Modbus numbering scheme for the PDU/RPP starts
at 0, so physical coil number 1 corresponds to Modbus register number 0, coil number 2
corresponds to Modbus register number 1, and so on.