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,
Timed Period Start
, and par.
23-64,
Timed Period Stop
). The two sets of data can be read from par. 23-61,
Continuous Bin
Data
(current) and par. 23-62,
Timed Bin Data
(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 90%-100% (MAX)
counter.
Once a second, the value of the operating variable selected is registered. If a value has been
registered to equal 13%, the counter “10% - <20%” will be updated with the value “1”. If the
value stays at 13% for 10s, then “10” will be added to the counter value.
The contents of counters can be displayed as bars on LCP. Select
Quick Menu
>
Loggings
:
Trending
Continued Bin / Trending Timed Bin / Trending Comparison
.
2. Parameter Description VLT
®
AQUA Drive Programming Guide
222
MG.20.O2.02 - VLT
®
is a registered Danfoss trademark
2
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