Service Manual
01/2017
23
2.
Power on again and observe whether the fault still exists after verification.
3.
Replacement and maintenance are necessary if the fault still exists after the above inspection, because probably the
IGBT module in the drive is damaged.
A08: incorrect encoder U/V/W connections
1.
Check the signal cable between the motor and the drive (from the drive to the motor encoder) for the following:
•
Whether the internal cable connections have faulty contacts
•
Whether the cable shielding is poor
•
Whether the shielded ground cable is connected correctly
2.
Power on again and observe whether the fault still exists after verification.
3.
If the fault still exists after the above operation, check the connection of the encoder interface.
4.
Replacement and maintenance are necessary if the fault still exists after the above operation, because probably the
motor encoder is damaged.
A09/F31117: encoder TTL pulse fault
1.
Check the signal cable between the motor and the drive (from the drive to the motor encoder):
•
Whether the connection of the encoder cable is correct
•
Whether the internal cable connections have faulty contacts
•
Whether the cable shielding is poor
•
Whether the shielded ground cable is connected correctly
2.
Power on again and observe whether the fault still exists after verification.
3.
If the fault still exists after the above operation, check the connection of the encoder interface.
4.
Replacement and maintenance are necessary if the fault still exists after the above inspection, because probably the
motor encoder is damaged.
F7452: following error out of tolerance; F7011/A7012: motor overload
1.
Check whether the cutting load is too high, or the spindle stops while the axes are still moving.
2.
Check whether the counter balance for axis Z is too light or pressure is low (milling machine).
3.
Check whether the encoder cable is loose.
3.18
Option activation failure after PPU replacement
Fault description
After the replacement of a defective PPU, the optional functions purchased earlier cannot be activated since the original
license key is invalid.
Remedy
Note
After the initial power up of the control system with the new PPU, you are recommended to import an existing commissioning
archive created with the previous PPU.
You must first contact the Siemens Hotline to unassign the licenses of the options, and then proceed through the following
steps to reactivate the options on the new PPU:
+
1.
Select the system data operating area.
2.
Press this key to view the extended softkeys.
Summary of Contents for SINUMERIK 808D
Page 30: ...Service Manual 30 01 2017 Notes ...
