Siemens SINAMICS V90 Operating Instructions Manual page 285

Fault
F7802: Infeed or power unit
not ready
Message class: Infeed faulted
(13)
Reaction: OFF2
Acknowledgement:
IMMEDIATELY
F7815: Power unit has been
changed
Message class: Error in the
parameteriza-
tion/configuration/commission
ing procedure (18)
Reaction: NONE
Acknowledgement:
IMMEDIATELY
F7900: Motor blocked/speed
controller at its limit
Message class: Applica-
tion/technological function
faulty (17)
Reaction: OFF2
Acknowledgement:
IMMEDIATELY
F7901: Motor overspeed
Message class: Applica-
tion/technological function
faulty (17)
Reaction: OFF2
Acknowledgement:
IMMEDIATELY
F7995: Motor identification
failure
Message class: Error in the
parameteriza-
tion/configuration/commission
ing procedure (18)
Reaction: OFF2
Acknowledgement:
IMMEDIATELY
F8501: PROFIdrive: Setpoint
timeout
Message class: Communica-
tion to the higher-level con-
troller faulted (9)
Reaction: OFF3
Acknowledgement:
IMMEDIATELY
SINAMICS V90, SIMOTICS S-1FL6
Operating Instructions, 04/2017, A5E37208830-003
Cause
After an internal power-on command, the
infeed or drive does not signal ready be-
cause of one of the following reasons:
Monitoring time is too short.
•
DC link voltage is not present.
•
Associated infeed or drive of the signal-
•
ing component is defective.
The code number of the actual power unit
does not match the saved number.
The servo motor has been operating at the
torque limit longer than 1s and below the
speed threshold of 120 rpm .
This signal can also be initiated if the
speed actual value is oscillating and the
speed controller output repeatedly goes to
its limit.
The maximumly permissible speed has
been exceeded.
For incremental motor, needs pole position
identification when the motor is servo on
for the first time. If the motor already in run
(i.e. by external force) position identifica-
tion may failure.
The reception of setpoints from the
PROFINET has been interrupted.
PROFINET connection interrupted.
•
Controller switched off.
•
Controller set into the STOP state.
•
PROFINET defective.
•
12.1 List of faults and alarms
Remedy
Ensure that there is a DC link voltage.
•
Check the DC link busbar. Enable the in-
feed.
Replace the associated infeed or drive of
•
the signaling component.
Connect the original power unit and power up
the Control Unit again (POWER ON).
Check whether the servo motor can rotate
•
freely or not.
Check the torque limit.
•
Check the inversion of the actual value.
•
Check the motor encoder connection.
•
Check the encoder pulse number.
•
Check and correct the maximum speed
•
(p1082).
Check if there are any peaks of actual
•
speed. If the value of the peak is especial-
ly large, contact the hotline.
Stop the motor before servo on.
Restore the PROFINET connection and set
the controller to RUN.
Diagnostics
285