Overcurrent monitoring
This function monitors the instantaneous value of the motor current and serves as motor protection.
NOTICE
With an incorrect parameterization, the maximum permissible motor current may be exceeded in the process.
Possible consequences: Irreversible damage of the motor
Avoid motor damages by using the overcurrent monitoring function as follows:
▶
The setting of the threshold for the overcurrent monitoring in 0x2D46:001 (P353.01) must be adapted to the connected motor.
▶
Set the maximum current of the inverter in 0x6073 (P324.00) much lower than the threshold for overcurrent monitoring for a dynamic limitation of the motor current.
Details
The inverter monitors its output current. This monitoring is independent of the maximum overload current setting. 
Maximum overload current of the inverter
Maximum overload current of the inverter –
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 setting 0x2D46:002 (P353.02) = "No response [0]", the monitoring function is deactivated.
The threshold for the overcurrent monitoring is preset to four times the rated motor current. This presetting is overwritten in case a motor in the engineering tool is selected from the "motor catalog" or the automatic identification or calibration of the motor data is carried out. For a suitable protection, the automatically adapted setting should be used. If disturbances occur during operation, the value can be increased.
Parameter
|
Address
|
Name / setting range / [default setting]
|
Information
|
|
|
0x2D46:001
(P353.01)
|
Overcurrent monitoring: Threshold
(Overcurr. monit.: Threshold)
0.0 ... [6.8]* ... 1000.0 A
* Default setting dependent on the model.
–
From version 02.00
|
Warning/error threshold for overcurrent monitoring of the motor.
–
If the active motor current exceeds the set threshold, the response set in 0x2D46:002 (P353.02) is triggered.
–
The parameter is calculated and set in the course of the automatic identification of the motor.
–
The parameter can also be set and overwritten by selecting a motor from the "motor catalogue" of the engineering tool or performing an automatic calibration of the motor.
|
|
|
0x2D46:002
(P353.02)
|
Overcurrent monitoring: Response
(Overcurr. monit.: Response)
|
Selection of the response to the triggering of motor current monitoring.
|
|
|
0
|
No response
|
||
|
1
|
Warning
|
||
|
2
|
Trouble
|
||
|
3
|
Fault
|
||
Options for optimizing the control loops