Siemens SINUMERIK 808D Commissioning Manual

Commissioning Manual
01/2017
491
Fault
Cause
Remedy
F7452: Following error too
high
Reaction: OFF1
Acknowledgement:
IMMEDIATELY
The difference between the position set-
point position actual value (following error
dynamic model) is greater than the toler-
ance.
• The drive torque or accelerating capac-
ity exceeded.
• Position measuring system fault.
• Position control sense incorrect.
• Mechanical system locked.
• Excessively high traversing velocity or
excessively high position reference
value (setpoint) differences.
Check the causes and resolve.
F7801: Motor overcurrent
Reaction: OFF2
Acknowledgement:
IMMEDIATELY
The permissible motor limit current was
exceeded.
• Effective current limit set too low.
• Current controller not correctly set.
• Motor was braked with an excessively
high stall torque correction factor.
• Up ramp was set too short or the load
is too high.
• Short-circuit in the motor cable or
ground fault.
• Motor current does not match the cur-
rent of Motor Module.
• Reduce the stall torque correction factor.
• Increase the up ramp or reduce the load.
• Check the motor and motor cables for
short-circuit and ground fault.
• Check the Motor Module and motor combi-
nation.
F7802: Infeed or power unit
not ready
Reaction: OFF2
Acknowledgement:
IMMEDIATELY
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 sig-
naling component is defective.
•
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.
F7815: Power unit has been
changed
Reaction: NONE
Acknowledgement:
IMMEDIATELY
The code number of the actual power unit
does not match the saved number.
Connect the original power unit and power up
the Control Unit again (POWER ON).
F7860: External fault 1
Reaction: OFF2
Acknowledgement:
IMMEDIATELY (POWER
ON)
The signal "external fault 1" was triggered.
• Restart the drive.
• Restore the drive to its factory default set-
tings.
F7900: Motor blocked/speed
controller at its limit
Reaction: OFF2
Acknowledgement:
IMMEDIATELY
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.
•
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.
F7901: Motor overspeed
Reaction: OFF2
Acknowledgement:
IMMEDIATELY
The maximum permissible speed has
been exceeded.
Check and correct the maximum speed
(p1082).

Siemens SINUMERIK 808D Specifications

General

Brand	Siemens
Model	SINUMERIK 808D
Category	Control Unit
Language	English