Lenze i550

10.8.3 Overcurrent monitoring
This funcon monitors the instantaneous value of the motor current and serves as motor pro-
tecon.
WARNING!
With an incorrect parameterisaon, the maximum permissible motor current may be excee-
ded in the process.
Possible consequences: irreversible damage of the motor.
Avoid motor damages by using the overcurrent monitoring funcon as follows:
▶
The seng of the threshold for the overcurrent monitoring in 0x2D46:001 (P353.01) must
be adapted to the connected motor.
▶
Set the maximum output current of the inverter in 0x6073 (P324.00) much lower than the
threshold for overcurrent monitoring.
Details
The inverter monitors its output current. This monitoring is independent of the maximum
overload current seng. 4Maximum overload current of the inverter^ 240
•
If the instantaneous value of the motor current exceeds the threshold set in 0x2D46:001
(P353.01), the response set in 0x2D46:002 (P353.02) takes place.
•
With the seng 0x2D46:002 (P353.02) = "No response [0]", the monitoring funcon is
deacvated.
The threshold for the overcurrent monitoring is preset to four mes the rated motor current.
This preseng is overwrien in case a motor in the engineering tool is selected from the
"motor catalog" or the automac idencaon or calibraon of the motor data is carried out.
For a suitable protecon, the automacally adapted seng should be used. If disturbances
occur during operaon, the value can be increased.
Parameter
Address Name / seng range / [default seng] Info
0x2D46:001
(P353.01)
Overcurrent monitoring: Threshold
(Overcurr. monit.: Threshold)
0.0 ... [6.8]* ... 1000.0 A
* Default seng depending on the size.
•
From version 02.00
Warning/error threshold for overcurrent monitoring of the motor.
•
If the acve motor current exceeds the set threshold, the response
set in 0x2D46:002 (P353.02) is eected for the purpose of motor pro-
tecon.
•
The parameter is calculated and set in the course of the automac
idencaon of the motor.
•
The parameter can also be set and overwrien by selecng a motor
from the "motor catalogue" of the engineering tool or performing an
automac calibraon of the motor.
4Opons for opmising the control loops ^ 213
0x2D46:002
(P353.02)
Overcurrent monitoring: Response
(Overcurr. monit.: Response)
Selecon of the response to the triggering of motor current monitoring.
Associated error code:
•
29056 | 0x7180 - Motor overcurrent
0 No response
4Error types ^ 611
1 Warning
2 Trouble
3 Fault
Conguring the motor control
Motor protecon
Overcurrent monitoring
235