266
POWER and RUN indicators will be lit and the ALARM/ERROR indicator will
be flashing. The RUN output will be ON.
Error and message FAL no. Probable cause Possible correction
FAL error
SYS FAIL FAL**
01 to 99 FAL(06) has been executed
in program. Check the FAL
number to determine
conditions that would cause
execution (set by user).
Correct according to cause
indicated by FAL number
(set by user).
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
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.
RMTE I/O 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.
SPECIAL UNIT ERR
Special I/O error
D0 Error has occurred in PC
Link Unit, Remote I/O
Master Unit, between a
Host, 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 or SR 252. If the unit
does not restart, replace it.
Battery error
BATT LOW
F7 Backup battery is missing or
its voltage has dropped.
Check battery and replace if
necessary.
The following error messages appear for errors that occur after program exe-
cution has been started. PC operation and program execution will stop and
all outputs from the PC will be turned OFF when any of the following errors
occur. No CPU indicators will be lit for the power interruption error. For all
Fatal Operating Errors
Error Messages Section 8-4
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