8 Monitoring functions
8.4 Monitoring of the motor utilisation (I²xt)
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Lenze · i700 servo inverter · reference manual · DMS 3.0 EN · 06/2016 · TD06
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8.4.1 Example of how to enter the characteristic for standard and servo motors
The required data of the operating points result from the S1 characteristic of the prevailing motor:
Examples for S1 characteristics
Standard motor
* Standard motor forced ventilated
** Standard motor self-ventilated
Servo motor Servo motor with derating at standstill
Object Characteristic point Info
Axis A Axis B
0x2D4D:1 0x354D:1 n
1
/n
n
* 100 % Speed = "0" (standstill)
0x2D4D:2
0x354D:2 I
1
/I
n
* 100 % Permissible motor current at standstill
0x2D4D:3
0x354D:3 n
2
/n
n
* 100 % Speed from which the current must be reduced for self-ventilated
motors.
• Below this speed the cooling air flow of the integral fan is not
sufficient anymore.
0x2D4D:4
0x354D:4 I
2
/I
n
* 100 % Permissible motor current at speed n
2
(torque reduction)
0x2D4D:5
0x354D:5 n
3
/n
n
* 100 % Rated speed
0x2D4D:6
0x354D:6 I
3
/I
n
* 100 % Permissible motor current at rated speed
0x2D4D:7
0x354D:7 n
4
/n
n
* 100 % Speed above the rated speed (in the field weakening range for
asynchronous motors)
0x2D4D:8
0x354D:8 I
4
/I
n
* 100 % Permissible motor current at speed n
4
(field weakening)
0
20
40
60
80
100
120
140
160
0 20 40 60 80 100 120 140 160
I/I * 100 %
n
n/n
n
* 100 %
*
**
0
20
40
60
80
100
120
140
160
0 20 40 60 80 100 120 140 160
I/I * 100 %
n
n/n
n
* 100 %
0
20
40
60
80
100
120
140
160
0 20 40 60 80 100 120 140 160
I/I * 100 %
n
n/n
n
* 100 %
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