Rockwell Automation 1404-M4_M5_M6_M8 Powermonitor 3000 User Manual, Firmware rev. 3.0 or LATER - Manual (Page 285)

Publication 1404-UM001F-EN-P - November 2009 285
Sample Applications Appendix C
Message Setup Dialogs
Read Message Dialog
Write Message Setup
PLC-5 Controller by Using Remote I/O
The second example also reads and writes the power monitor date
and time but uses a PLC-5 controller and remote I/O. In this example,
a power monitor has a logical address of Rack 1, Group 0. The PLC-5
data table files used are the same as in the previous example. The
main difference is that this example uses block transfer instructions
rather than message instructions, and the block transfer length
determines which data table is selected.