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
.
NB!
The counters starts counting whenever the frequency converter is powered-up. Power cycle shortly after a reset will zero the counters.
EEProm data are updated once per hour.
VLT
®
HVAC Drive Programming Guide 3. Parameter Description
MG.11.C5.02 - VLT
®
is a registered Danfoss trademark
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