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NOTE!
When mounting an Analog I/O MCB109 option card, a battery back-up of the date and time is included.
23-54 Reset Energy Log
Option:
Function:
Select
Do reset
[1] to reset all values in the Energy Log counters shown in par.23-53
.
After pressing OK, the setting of the parameter value will automatically change to
Do not reset
[0].
[0] *
Do not reset
[1]
Do reset
3.21.4 23-6* Trending
Trending is used to monitor a process variable over a period of time and record how often the data falls into each of ten user-defined data ranges. This
is a convenient tool to get a quick overview indicating where to put focus for improvement of operation.
Two sets of data for trending can be created in order to make it possible to compare current values for a selected operating variable with data for a
certain reference period, for the same variable. This reference period can be pre-programmed (par.23-63
). The two sets of data can be read from par.23-61
(reference).
It is possible to create trending for following operation variables:
-
Power
-
Current
-
Output frequency
-
Motor Speed
The trending function includes ten counters (forming a bin) for each set of data containing the numbers of registrations reflecting how often the operating
variable is within each of ten pre-defined intervals. The sorting is based on a relative value of the variable.
The relative value for the operating variable is
Actual/Rated * 100%.
for Power and Current and
Actual/Max * 100%
for Output Frequency and Motor Speed.
The size of each interval can be adjusted individually, but will default be 10% for each. Power and current can exceed rated value, but those registrations
will be included in the 90%–100% (MAX) counter.
3 Parameter Description
VLT
®
HVAC Drive Programming Guide
3-222
MG.11.C6.22 - VLT
®
is a registered Danfoss trademark
3