4 - communication, Ethernet/ip communication, Chapter 4 – Rockwell Automation 1420 PowerMonitor 500 User Manual

Page 35: Communication, Chapter

Rockwell Automation Publication 1420-UM001D-EN-P - September 2013

Chapter

Communication

EtherNet/IP Communication

EtherNet/IP communication is supported in PowerMonitor 500 units ordered

with optional Ethernet communication. Communication parameters in the

power monitor must be configured. Refer to

The PowerMonitor 500 unit provides nine assembly instances containing real-

time, maximum, demand, energy, and status data that can be read by a client by

using implicit messaging (Class 1) or explicit messaging (Class 3 or UCMM).

lists the assembly instances, sizes, data types, and other details. The

power monitor returns EtherNet/IP data as little-endian, the same byte order

used in the Logix family of programmable controllers.

Figure 20 - Byte Order Example

The power monitor supports the following communication commands:

• CIP Generic Assembly Object (Class 04), Get_Attribute_Single (service

code 0x0E) for Attribute 3 (data)

• CIP Generic Assembly Object (Class 04), Get_Attribute_Single (service

code 0x0E) for Attribute 4 (size in bytes)

Refer to

for additional information on the EtherNet/IP

communication implementation in the PowerMonitor 500 unit.

TIP

The Ethernet hardware address (MAC ID) is printed on the unit label.

IMPORTANT

The power monitor does not support configuration or commands on

EtherNet/IP network. To write the configuration of command data, refer to the
section on

MSb (Most Significant Bit)

(Least Significant Bit) LSb

Word

Low Byte (LSB)

High Byte (MSB)