Siemens SINAMICS V20 Operating Instructions Manual page 330

Faults and alarms
9.2 Alarms
Alarm
A511
Motor overtemperature
I t
2
A535
Braking resistor over-
load
A541
Motor data identifica-
tion active
A600
RTOS overrun warning
A910
Vdc_max controller de-
activated
A911
Vdc_max controller
active
330
Cause
Motor overloaded.
•
Load cycles or load steps too high.
•
The braking energy is too large.
The braking resistor is not suited for the
application.
Motor data identification (P1900) selected
or running.
Internal time slice overrun
Occurs
if main supply voltage (P0210) is per-
•
manently too high.
if motor is driven by an active load,
•
causing motor to go into regenerative
mode.
at very high load inertias, when ramping
•
down.
If warning A910 occurs while the inverter is
in standby (output pulses disabled) and an
ON command is subsequently given, the
Vdc_max controller (A911) will not be acti-
vated unless warning A910 is rectified.
The Vdc_max controller works to keep the
DC-link voltage (r0026) below the level
specified in r1242.
Remedy
Independently of the kind of temperature determina-
tion check:
P0604 motor temperature warning threshold
•
P0625 motor surrounding temperature
•
Check if name plate data is correct. If not, per-
•
form quick commissioning. Accurate equivalent
circuit data can be found by performing motor
identification (P1900 = 2).
Check if motor weight (P0344) is reasonable.
•
Change if necessary.
With P0626, P0627, and P0628 the standard
•
overtemperature can be changed, If the motor is
not a SIEMENS standard motor.
Reduce the braking energy.
Use a braking resistor with a higher rating.
Contact service department.
Check the following:
Input voltage must lie within range.
•
Load must be match.
•
In certain cases apply braking resistor.
•
Check the following:
Supply voltage must lie within limits indicated on
•
rating plate.
Ramp-down time (P1121) must match inertia of
•
load.
Note:
Higher inertia requires longer ramp times; other-
wise, apply braking resistor.
Operating Instructions, 11/2016, A5E34559884-006
SINAMICS V20 Inverter