KFU 2-/4-
230
18.3
Actual value memory
The assessment of the operating behavior and the maintenance of the frequency
inverter in the application are facilitated by storing various actual values. The actual
value memory guarantees monitoring of the individual variables for a definable pe-
riod. The parameters of the actual value memory can be read out via a communica-
tion interface and displayed via the operating unit. In addition, the operating unit pro-
vides monitoring of the peak and mean values in the VAL menu branch.
Actual value memory
No.
Description
Function
231
Peak Value Long Term Ixt
Utilization of the device-dependent overload of
60 seconds.
232
Peak Value Short Term Ixt
Utilization of the device-dependent overload of 1
second.
287
Peak value Vdc
The maximum DC link voltage measured.
288
Average value Vdc
The mean DC link voltage calculated in the pe-
riod of observation.
289
Peak value heat sink temp.
The highest measured heat sink temperature of
the frequency inverter.
290
Average value heat sink
temp.
The mean heat sink temperature calculated in
the period of observation.
291
Peak value inside temp.
The maximum measured inside temperature in
the frequency inverter.
292
Average value inside temp.
The mean inside temperature calculated in the
period of observation.
293
Peak value Iabs.
The highest abs. current calculated from the
measured motor phases.
294
Average value Iabs
The mean abs. current calculated in the period
of observation.
295
Peak value active power pos. The largest calculated active power in motor op-
eration.
296
Peak value active power neg.
Maximum generator active power calculated
from the voltage, the current and the control
variables.
297
Average value active power
The mean active power calculated in the period
of observation.
301
Energy positive
The calculated energy to the motor in motor op-
eration.
302
Energy negative
The calculated energy from the motor in gen-
erator operation.
Note:
The actual values can be read out and monitored in the VAL menu branch
of the operating unit. The parameter
Operation level
28
in the PARA menu
branch defines the selection of the actual value parameters to be selected.
