Danfoss VLT FC 103 Programming Manual page 148

Parameter Description
23-54 Reset Energy Log
Option: Function:
Select [1] Do reset to reset all values in the
Energy Log counters shown in 23-53 Energy
Log. After pressing OK the setting of the
parameter value will automatically change to
[0] Do not reset.
[0] Do not reset
[1] Do reset
3.18.6 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 focus on
improvement of operation.
Two sets of data for Trending can be created to make it
possible to com 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 (23-63 Timed Period Start and 23-64 Timed
Period Stop). The two sets of data can be read from
23-61 Continuous Bin Data (current) and 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
®
VLT Refrigeration Drive Programming Guide
exceed rated value, but those registrations will be included
in 90%-100% (MAX) counter.
%
100
90
80
70
60
50
40
30
20
10
Illustration 3.60
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 Comson.
NOTE
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.
23-60 Trend Variable
Option:
[0]
[1]
[2]
[3]
®
MG16H102 - VLT is a registered Danfoss trademark
Relative value
operating variable
Function:
Select the desired operating variable to be
monitored for Trending.
Power [kW] Power yielded to the motor. Reference for
*
the relative value is the rated motor power
programmed in 1-20 Motor Power [kW] or
1-21 Motor Power [HP]. Actual value can be
read in 16-10 Power [kW] or 16-11 Power [hp].
Current [A] Output current to the motor. Reference for
the relative value is the rated motor current
programmed in 1-24 Motor Current. Actual
value can be read in 16-14 Motor current.
Frequency Output frequency to the motor. Reference
[Hz] for the relative value is the maximum output
frequency programmed in 4-14 Motor Speed
High Limit [Hz]. Actual value can be read in
16-13 Frequency.
Motor Speed Speed of the motor. Reference for relative
[RPM] value is the maximum motor speed
programmed in 4-13 Motor Speed High Limit
[RPM].
3 3
Counter 9: +0
Counter 8: +6
Counter 7: +2
Counter 6: +1
Counter 5: +11
Counter 4: +0
Counter 3: +1
Counter 2: +0
Counter 1: +1
Counter 0: +5
147