Danfoss VLT AutomationDrive FC 301 Programming Manual page 242

Parameter Descriptions
Select parameter 14-61 Function at Inverter Overload to
automatically reduce motor speed until the output current
is below 100% of the rated current (set in
parameter 14-62 Inv. Overload Derate Current).
Parameter 14-61 Function at Inverter Overload is an
alternative to letting the frequency converter trip.
3 3
The frequency converter estimates the load on the power
section with an inverter load counter, which causes a
warning at 98% and a reset of the warning at 90%. At the
value 100%, the frequency converter trips and issues an
alarm.
Status for the counter can be read in
parameter 16-35 Inverter Thermal.
If parameter 14-61 Function at Inverter Overload is set to [3]
Derate, the motor speed is reduced when the counter
exceeds 98%, and stays reduced until the counter has
dropped below 90.7%.
If parameter 14-62 Inv. Overload Derate Current is set to for
example 95%, a steady overload causes the pump speed to
fluctuate between values corresponding to 110% and 95%
of rated output current for the frequency converter.
14-61 Function at Inverter Overload
Option:
[0] Trip
*
[1] Derate
14-62 Inv. Overload Derate Current
Range:
95 %
*
3.14.8 14-7* Compatibility
Parameters for compatibility of VLT 3000 and VLT 5000
with FC 300.
240
Function:
Use in case of steady overload
beyond the thermal limits (110% for
60 s).
Select [0] Trip to make the
frequency converter trip and issue
an alarm.
Reduces the motor speed to
decrease the load on the power
section and allowing it to cool
down.
Function:
[50 - 100 %] Enter the current level (in % of
rated output current for the
frequency converter) when running
with reduced motor speed after
load on the frequency converter
has exceeded the allowable limit
(110% for 60 s).
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VLT AutomationDrive FC 301/302
14-72 Legacy Alarm Word
Range:
0
*
14-73 Legacy Warning Word
Range:
0
*
14-74 Leg. Ext. Status Word
Range:
0
*
3.14.9 14-8* Options
14-80 Option Supplied by External 24VDC
Option:
[0]
[1]
*
14-88 Option Data Storage
Range:
0
*
14-89 Option Detection
Selects the behavior of the frequency converter when a change
in the option configuration is detected.
Option:
[0]
*
[1]
Function:
[0 - Readout of the alarm word
4294967295 ] corresponding to VLT 5000.
Function:
[0 - Readout of the warning word
4294967295 ] corresponding to VLT 5000.
Function:
[0 - Readout of the external status word
4294967295 ] corresponding to VLT 5000.
Function:
NOTICE
This parameter is only
changing function by
performing a power cycle.
No Select [0] No to use the frequency
converter's 24 V DC supply.
Yes Select [1] Yes if a 24 V DC external
supply is used to power the option.
Inputs/outputs are galvanically
isolated from the frequency
converter when operated from an
external supply.
Function:
[0 - 65535 ] This parameter stores information
about options over a power cycle.
Function:
Protect Option Freezes the current settings and
Config. prevents unwanted changes when
missing or defective options are
detected.
Enable Option Changes frequency converter
Change settings and is used when
modifying the system configuration.
This parameter setting returns to [0]
Protect Option Config. after an
option change.
M0013101