Rockwell Automation 1404-M4_M5_M6_M8 Powermonitor 3000 User Manual, Firmware rev. 3.0 or LATER - Manual (Page 143)

143 Publication 1404-UM001F-EN-P - November 2009 143
Chapter
7
Data Logging
Its inherent data logging capability makes the power monitor a
versatile component in a number of power and energy applications.
Cost allocation applications can read billing variables like energy
usage and demand from the configurable Trend Log, making the
accuracy of reports less dependent on a continuous network
connection. The Event Log captures time-stamped records of
important power system occurrences that can be aligned with
corresponding production or environmental effects to better
understand and optimize your energy use and costs. This chapter
describes in detail the data logging functions in the power monitor.
Event Log The Event Log contains records stored in nonvolatile memory of the
50 (M4 and M5) or 100 (M6 and M8) most recent events that occurred
in the power monitor. Event records may include the following:
•
changes in the unit configuration.
•
setpoint activation and release.
•
relay or KYZ output forcing.
•
status input change of state.
•
power-up and power-down.
•
clearing or presetting of an energy counter.
•
setting the unit time and date.
•
clearing of the trend or min/max log.
•
clearing of setpoint timers.
•
detection of a sag, swell, or transient.