Lenze L-force HighLine C 8400 Series Reference Manual page 267

 In C000937/1, the actually used maximally effective field-producing motor current is
displayed.
– With switched-on and active field weakening: 0.00 A ... -x.xx A
– With sensorless control for synchronous motors (SLPSM), the injected current is
displayed in open-loop controlled operation: 0.00 A ... +x.xx A
– If neither field weakening nor open-loop controlled operation are active,e "0.00 A" is
displayed.

Note!
If a Lenze motor is used:
The controller is automatically parameterised so that field weakening operates
optimally and the maximally permissible speed is monitored.

Stop!
If an OEM motor is used:
If pulse inhibit is set in the controller, the DC bus is loaded with the voltage that
corresponds to the current speed of the machine.
Since with switched-on field weakening higher speeds can be achieved at a
correspondingly higher rotor voltage of the motor, the DC bus can be loaded to
a voltage higher than the set DC-bus voltage in case of pulse inhibit and a
currently high motor speed and even exceed the maximally permissible voltage
of 800 V!
For device protection, either use a brake chopper or parameterise the motor
speed monitoring via
possible which would be also reachable without field weakening with a DC-bus
voltage of = 800 V.
Firmware ≤ 11.00 - DMS 6.0 EN - 10/2011
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8400 HighLine C | Reference manual
Parameterisable additional functions
C00965 in such a way that only a maximum speed is
Motor speed monitoring
L
Motor control (MCTRL)
( 299)
267