Allen-Bradley 1420-V1, User Manual, Page: 29 / 90

Rockwell Automation Publication 1420-UM001E-EN-P - March 2016 29
Unit Configuration Chapter 3
•
80 DMD: This function lets you select the
calculation method of the DMD/AVG value of the
selected variable.
–
81 TYPE: select the type of Calculation mode to be
used for the DMD/AVG calculation.
FIXED: The instrument calculates the
AVG/DMD value of the measured variable over the
selected interval, updates the AVG/DMD value at
the end of the interval, then resets and starts a new
calculation.
SLIDE: When first configured, the instrument
calculates the AVG/DMD value and updates its
value at the beginning after the first selected
interval. After the first interval, the instrument
calculates the AVG/DMD value every minute.
After the calculation, the instrument generates a
window whose width is the selected interval and
that moves forward every minute.
–
82 TIME: select the time interval for the DMD/
AVG calculation. Default is 15 minutes.
–
83 SYNC: select the Synchronization mode. That
mode is the method that controls the calculation
method of the average/demand according to the
selected time.
•
110 FILTER: The digital filter makes it possible to
stabilize the display of fluctuating measurements.
See Digital Filtering Operation on page 32 .
–
111 FILTER S: set the operating range (span) of the
digital filter. The value is expressed as a % (filter to
0.0 means filter excluded).
–
112 FILTER CO: set the filtering coefficient of the
instantaneous measures. By increasing the value, also
the stability and the settling time of the measures are
increased.
IMPORTANT: Some specific menus display only if
the relevant modules are installed.
Where:
Pmax is the maximum power
Pc is the contractual power
t1 is the selected time period for the calculation of the AVG/DMD value
Fixed
Slide