SKS Sweden Bonfiglioli Vectron ACTIVE CUBE ACU 201 Series, Operating Instructions Manual, Page: 131 / 260

09/08
Operating Instructions ACU
129
12 Error and warning behavior
Operation of the frequency inverter and the connected load are monitored conti-
nuously. The monitoring functions are to be parameterized with the corresponding
limit values specific to the application. If the limits were set below the switch-off limit
of the frequency inverter, a fault switch-off can be prevented by suitable measures if
a warning message is issued.
The warning message is displayed by the LED's and can be read out on the operating
unit via parameter
Warnings
269 or output via one of the digital control outputs.
12.1 Overload Ixt
The admissible load behavior depends on various technical data of the frequency
inverters and the ambient conditions.
The selected
Switching frequency
400 defines the rated current and the available
overload for one second and sixty seconds, respectively. The
Warning Limit Short
Term Ixt
405 and
Warning Limit Long Term Ixt
406 are to be parameterized accor-
dingly.
Parameter Settings
No. Description Min. Max. Fact. sett.
405 Warning Limit Short Term Ixt 6 % 100 % 80 %
406 Warning Limit Long Term Ixt 6 % 100 % 80 %
Exceeding of warning limit is signaled by 165 - Warning Ixt”.
Output signals
Digital signals indicate the attainment of warning limits.
165 - Warning Ixt
1) Warning Limit Short Term Ixt
405 or
Warning Limit
Long Term Ixt
406 is attained. 7 - Ixt-Warning
2)
1)
For linking with inverter functions
2)
For digital output
12.2 Temperature
The ambient conditions and the energy dissipation at the current operating point
result in the frequency inverter heating up. In order to avoid a fault switch-off of the
frequency inverter, the
Warning Limit Heat Sink Temp.
407 for the heat sink temper-
ature limit and the
Warning Limit Inside Temp.
408 as an internal temperature limit
are to be parameterized. The temperature value at which a warning message is out-
put is calculated from the type-dependent temperature limit minus the adjusted
warning limit.
The switch-off limit of the frequency inverter for the maximum temperature is an
internal temperature of 65 °C and a heat sink temperature of 80 °C – 90 °C.
Parameter Settings
No. Description Min. Max. Fact. sett.
407 Warning Limit Heat Sink Temp. -25 °C 0 °C -5 °C
408 Warning Limit Inside Temp. -25 °C 0 °C -5 °C
Note: Minimum temperatures are defined as -10 °C (interior) and 30 °C (heat
sink temperature.
Operating Instructions ACU 129 09/08