Lenze 8400 HighLine - Manual (Page 298)

5 Motor control (MCTRL)
5.14 Monitoring
298
Lenze · 8400 HighLine · Referenzhandbuch · DMS 10.0 EN · 06/2014 · TD05/TD14
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
Tip!
• If forced ventilated motors are used, a premature response of the overload threshold can
be avoided by deactivating this function if necessary ( C00606 = "0: No Reaction").
• The current limits set in C00022 and C00023 influence the I
2
xt calculation only in an
indirect way. However, the operation of the motor at maximum possible load can be
averted.  Defining current and speed limits ( 151)
5.14.3 Motor overcurrent monitoring
The ultimate motor current to be parameterised in C00939 is a limit value to protect the motor from
destruction, influence of the rated data and demagnetisation.
• This limit value must not be travelled cyclically in the drive process.
• If the instantaneous value of the motor current exceeds the limit value set in
C00939 , the error
response "Fault" occurs to protect the motor and the error message " oC7: Motor overcurrent " is
entered into the logbook.
• The maximum currents to be parameterised in C00022 and C00023 should have a sufficient
distance to this limit value.
Related topics:
 Maximum current monitoring ( 305)

Note!
If a Lenze motor is selected from the catalogue whose plant parameters are transferred
into the controller, the setting of the maximum current in C00022 and C00023 will
automatically be adapted to the selected motor.