Rockwell Automation 9307 FactoryTalk EnergyMetrix - Manual (Page 323)

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LOSSARY
C
Communication, serial: RS232 offers point-to-point serial communication with only one
power monitor at a maximum distance of 50 feet. To communicate over distances
greater than 50 feet, or to communicate with multiple power monitors via the
same serial port, use RS485 serial communication. Using RS485 communication
requires either an external RS232-RS485 converter or an internal RS485 serial
card installed in the computer.
CUSUM: CUSUM represents the CUmulative SUm of the deviation between actual and
target dependent variable in successive intervals. The CUSUM chart has a number
of properties that provide tools in analyzing your energy usage. When the trend is
horizontal or nearly so, it signifies that deviances are equally balanced around
zero, that is, that the monitored process is operating near the current target. An
upward trend signifies persistent over-consumption relative to the current target,
while a downward trend indicates cumulative savings. Points of inflection (where
the slope changes markedly) signifies a change in the behavior of the monitored
process and can point to opportunities for improvement.
D
Device: A physical source of data (see below). A Device is an external hardware device or
software application that supplies data either directly or indirectly to through
another Device. Device examples include power monitors, EEMs, and PLCs. A
software application example is an OPC server.
Domain: A domain is a Group that Roles, Meters, and Reports can be assigned to.
Download: Transfer configuration settings from the database to a power monitor device.
E
Energized: Indicates that contacts have changed from their default state. Normally open
contacts have closed, or normally closed contacts have opened.
Equal setpoint: An equal setpoint becomes active when the monitored parameter equals
the setpoint high limit. An equal setpoint becomes inactive when the monitored
parameter does not equal the setpoint high limit.
Event log: A data file which contains activity information about the power monitor,
including setpoint alarm activity, relay activity, status input activity, power up,
and changes to setup parameters.