Rockwell Automation 1404-M4_M5_M6_M8 Powermonitor 3000 User Manual, Firmware rev. 3.0 or LATER - Manual (Page 103)

Publication 1404-UM001F-EN-P - November 2009 103
Communication Chapter 4
DeviceNet Unique Write Identifier
The communication interface used in the DeviceNet communication
option is programmed to reject duplicate write messages. Because of
this, all writeable data tables in the power monitor include an element
called DeviceNet unique write identifier. In many cases, your client
application may ignore this element because the message data is
unique. However, where your client application performs repeated
identical writes, it should increment the DeviceNet Unique Write
Identifier with each new message. An example of this would be
reading the Event Log or Trend Log.
Ethernet Communication Option
The Powermonitor 3000 units with optional Ethernet communication
operates as a slave device on the Ethernet network. You can use your
web browser and the unit’s built-in web server to access metering and
stats data.
Starting with Master Module firmware version 4 and Ethernet firmware
version 3, the Ethernet port may be configured for the following
protocol selections:
•
CIP - This default selection maintains compatibility with prior
firmware versions. It provides support for CIP generic messaging
as well as PCCC encapsulated messaging. It must be selected for
compatibility with RSEnergyMetrix, RSPower, and RSPowerPlus
software.
•
CSP - This optional selection supports legacy client/server
protocol (CSP) messaging with older PLC and SLC controllers
and certain 3rd-party ’A-B Ethernet’ drivers.
•
CIP/CSP - This dual stack protocol selection may be used when
both third-party CSP drivers and CIP messaging are desired. This
selection is incompatible with RSEnergyMetrix, RSPower, and
RSPowerPlus software.
The following table summarizes the protocol selection options.