287
Most of these are also indicated by FAL number being transferred to the FAL
area of the SR area.
The type of error can be quickly determined from the indicators on the CPU,
as described below for the three types of errors. If the status of an indicator is
not mentioned in the description, it makes no difference whether it is lit or not.
After eliminating the cause of an error, clear the error message from memory
before resuming operation.
Asterisks in the error messages in the following tables indicate variable nu-
meric data. An actual number would appear on the display.
The following error messages appear before program execution has been
started. The POWER indicator will be lit and the RUN indicator will not be lit
for either of these. The RUN output will be OFF for each of these errors.
Error and message
FAL no.
Probable cause
Possible remedy
Waiting for start input
CPUWAIT G
None
Start input on CPU
Power Unit is OFF.
Short start input terminals on CPU
Power Unit.
Waiting for Remote I/O
CPUWAIT G
None
Power to Remote I/O
Unit is off or terminator
cannot be found or more
than one terminator has
been set.
Check power supply to Remote
I/O Units, connections between
Remote I/O Units, and terminator
setting.
The following error messages appear for errors that occur after program exe-
cution has been started. PC operation and program execution will continue
after one or more of these errors have occurred. For each of these errors, the
POWER, RUN, and ALARM indicators will be lit and the ERR indicator will
not be lit. 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
SCAN 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.
Remote
I/O
Master
Unit
Remote I/O error
RMTE I/O ERR
B0 to B7
Error occurred in
transmissions between
Remote I/O Units.
Check transmission line between
PC and Master and between
Remote I/O Units.
Initialization Errors
Non-fatal Operating Errors
Error Messages
Section 8-4
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