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Error and message Possible correctionProbable causeFAL no.
High-density I/O Unit error
SYS FAIL FAL9A
9A An error occurred in data
transfer between a
High-density I/O Unit and
the CPU.
Check AR 0205 to AR 0214
to identify the Unit with a
problem, replace the Unit,
and restart the PC.
PC Setup error
SYS FAIL FAL9B
9B An error has been detected
in the PC Setup. This error
will be generated when the
setting is read or used for
the first time.
Check an correct PC Setup
settings.
Memory Cassette Transfer error
SYS FAIL FAL9D
9D An error has occurred
during data transmission
between UM and a Memory
Cassette because:
Not in PROGRAM Mode.
UM or Memory Cassette is
read-only.
Insufficient capacity in UM
or Memory Cassette.
A checksum error occurred
in the Memory Cassette
Make sure that the PC is in
PROGRAM mode.
Make sure that the Memory
Cassette is not
write-protected.
Make sure that the UM and
Memory Cassette capacity
is sufficient.
Make sure that SYSMAC
NET data links are not
active during the transfer.
Transfer the data again.
Cycle time overrun
CYCLE TIME OVER
F8 Watchdog timer has
exceeded 100 ms.
Program cycle time is
longer than recommended.
Reduce cycle time if
possible.
I/O table verification error
I/O VER ERR
E7 Unit has been removed or
replaced by a different kind
of Unit, making I/O table
incorrect.
Use I/O Table Verify
Operation to check I/O table
and either connect dummy
Units or register the I/O
table again.
REMOTE ERR
Remote I/O error
*
Remote I/O
Master Unit number
B0 or B1 Error occurred in
transmissions between
Remote I/O Units.
Check transmission line
between PC and Master
and between Remote I/O
Units.
SIOU ERR
Special I/O Unit error
D0 Error has occurred in PC
Link Unit, Remote I/O
Master Unit, between a
Host Link, SYSMAC LINK,
or SYSMAC NET Link Unit
and the CPU, or in refresh
between Special I/O Unit
and the CPU.
Determine the unit number
of the Unit which caused the
error (AR 00), correct the
error, and toggle the
appropriate Restart Bit in
AR 01, SR 250, or SR 252.
If the Unit does not restart,
replace it.
Group-2 High-density I/O error
SYS FAIL FAL 9A
9A An error has occurred
during data transmission
between the CPU and a
Group-2 High-density I/O
Unit.
Determine the unit number
of the Unit which caused the
error (AR 02), replace the
Unit, and try to power-up
again.
Battery error
BATT LOW
F7 Backup battery is missing or
its voltage has dropped.
Check battery, and replace
if necessary.
Error Messages Section 10-4