15BError messages
105BSystem errors: error codes F21...F30 (FAT errors)
16-9
16.4
System errors: error codes F21...F30 (FAT errors)
FAT = File Allocation Table (part of the memory management)
•
Menu operation interrupted.
•
Error message superposes menu screen
•
Error message only disappears after:
error has been removed AND
error message has been acknowledged by means of the right function key.
Error message
Cause(s)
Solution
F21
Invalid FAT checksum detected
The checksum of the FAT contains an
invalid value.
Possible cause: impermissible interfer-
ence on the 24V power supply during
the storage operation of the data in the
flash device.
►
Grounding of the device via the DIN
rail
►
Connection of the FE terminal to the
machine ground
►
Use a switched-mode power supply
to supply the device.
►
Repeat the command
F22
Invalid FAT header detected
The code in the header of the FAT con-
tains an invalid entry.
Possible cause: impermissible interfer-
ence on the 24V power supply during
the storage operation of the data in the
flash device.
►
ditto
F23
Invalid FAT identifier
The field ID of an FAT area contains an
invalid value.
Possible cause: impermissible interfer-
ence on the 24V power supply during
the storage operation of the data in the
flash device.
►
ditto
F24
Blank FAT found
The FAT does not contain any entry.
Possible cause: the user has completely
deleted the flash module
►
Replace the unit and project again
F25
Checksum of the remanent data invalid
The checksum of the remanent data
within the FAT contains an invalid value.
Possible cause: impermissible interfer-
ence on the 24V power supply during
the storage operation of the data in the
flash device.
►
Grounding of the device via the DIN
rail
►
Connection of the FE terminal to the
machine ground
►
Use a switched-mode power supply
to supply the device.
►
Repeat the command