Lenze EVF9383 - Manual (Page 281)

Configuration
Monitoring
Maximum speed
8
8.3
8.3.3
l
8.3−3 EDSVF9383V EN 7.1−04/2012
8.3.3 Maximum speed
(
Stop!
Destruction of the drive!
ƒ If the fault is triggered, the drive is without torque.
ƒ In the event of an actual speed value encoder failure it is not
guaranteed that the monitoring responds.
Protective measures:
ƒ Use a mechanical brake if necessary.
ƒ Special, system−specific measures are to be taken.
The NMAX fault is triggered if the system speed (MCTRL−NACT)
ƒ exceeds the value set under C0596 or
ƒ exceeds the maximum speed n
max
(C0011) by twice the max. speed
value.
A fault initiates TRIP NMAX. Other responses cannot be set.
8.3.4 Motor
Fault OC1 is triggered if the motor current exceeds the 2.25−fold rated
controller current.
If a fault occurs, TRIP OC1 is triggered. Other responses cannot be set.
The OC2 fault is triggered if
ƒ the motor has a short circuit to the frame,
ƒ one of the phases has a short circuit to the shield,
ƒ one of the phases has a short circuit to PE,
ƒ the capacitive charging current of the motor cable is too high.
A fault initiates TRIP OC2. Other responses cannot be set.
Fault OC3 is activated in the case of a too great load during acceleration. The
acceleration times or deceleration times (C0012, C0013, C0105) are set too
short in proportion to the load.
If a fault occurs, TRIP OC3 is activated. Other responses cannot be set.
Overcurrent in the motor
cable (OC1)
Earth fault in the motor cable
(OC2)
Overload during acceleration
or deceleration (OC3)