Rockwell Automation 1404-M4_M5_M6_M8 Powermonitor 3000 User Manual, PRIOR to Firmware rev. 3.0 - Manual (Page 262)

Publication 1404-UM001D-EN-E - October 2004
C-8 Sample Applications
protocol must be CIP or CSP/CIP dual stack to enable
communications with the ControlLogix controller.
Tags
The example uses two ControlLogix tags, PM3K_Date_Time and
Set_date_time. Both are arrays of 8 INT elements. The program also
uses two standard MESSAGE tags, Read_time and Set_time. The
following figure shows the Set_date_time to set the Powermonitor
3000 clock to January 1, 2003 at midnight. The tag PM3K_Date_Time
shows the results of a read 7.13 seconds after the write.