2 i2t monitoring, I2t monitoring, Function library – Lenze LDECBBF1xxxxxxHx User Manual
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Function library
Monitoring
I
2
t monitoring
l
61
LDEDS−CCU210B EN 4.0
Description
Possible settings
Code
Selection
Lenze
Byte
<
ñò
No.
C0478
SensoPart:
deceleration ramp Vx
ð VLx for
frequency limitation distance in ...
^ 57
1 RW
EXT
4
50
1
{Hz/s}
255 ... Parameter set 1
2
50
... Parameter set 2
C0610
R
4
SensoPart: current distance
^ 57
0
{mm}
65535
8.6.2
I
2
t monitoring
By means of the I
2
xt monitoring, the motor utilisation is monitored. The monitoring
simulates a motor protection switch.
How to configure the motor protection switch:
ƒ
Enter the rated motor current in C0022.
ƒ
Enter the tripping class in C0121.
ƒ
Define the response in the case of overload in C0122.
(
Stop!
Possible overheating of the motor
The I
2
xt monitoring does not present a full motor protection, as the motor
temperature calculated is reset every time the mains is switched off.
Possible consequences:
ƒ
The connected motor can be overheated when the mains is switched on
again if ...
– ... the motor already is strongly heated and is continued to be overloaded.
– ... the cooling air supply is interrupted.
– ... the cooling air is too warm.
Protective measures:
ƒ
Provide for a full motor protection that is additionally equipped with a PTC
thermistor or a thermal contact in the motor.
ƒ
The PTC thermistor or thermal contact has to be wired and connected
correctly.