Rockwell Automation 1408-EMxx PowerMonitor 1000 Unit - Manual (Page 53)

Rockwell Automation Publication 1408-UM001D-EN-P - September 2013 53
Chapter
5
Explicit Messaging
This section discusses data retrieval and parameter configuration using explicit
messaging from Rockwell Automation controllers. Explicit messaging allows you
to read and write from a controller to specific data tables within the power
monitor. With explicit messages, users can read real-time power and energy
values, configure analog input parameters, configure communication parameters,
and also read energy logs.
In general, these instructions apply to Ethernet network communication
(Ethernet/IP protocol) and Serial communication (DF1 half-duplex or full-
duplex or DH485 protocols), provided that the protocol is supported by the
controller. If using serial communication, the controller serial port must be
correctly configured for protocol, communication rate, or parity. Refer to the
appropriate controller user documentation for further details.
Please refer to Appendix A , PowerMonitor 1000 Data Tables for descriptions of
the power monitor data tables and their data access privileges, and data types.
The power monitor allows PLC-5 Typed, SLC Typed, and CIP Generic message
requests.
Explicit Message Setup –
Examples
This section gives examples on how to set up explicit messaging.
Read/Write Single or Multiple Elements
You can perform single or multiple element reads and writes to the power
monitor. Below is a table documenting the message type to use for specific read/
write type and communication scenarios.
IMPORTANT When performing a write to the power monitor, you must write
the password value to the password element of that specific
data table that you are writing to. This must be done in the
same message; therefore you must perform a multiple element
write. If you wish to perform only a single element write, you
must write the password value to the Single Element Password
Write table. This allows you to perform writes to any write
access data table for the next 30 minutes.