80
Error and message Possible correctionProbable causeFAL no.
Too many Units
I/O UNIT OVER
E1 Two or more Special I/O
Units are set to the
same unit number
Two or more Group-2
High-density I/O Units or
B7A Interface Units are
set to the same I/O
number or I/O word.
The I/O number of a
64-pt Group-2
High-density I/O Unit is
set to 9.
SYSMAC NET or
SYSMAC LINK systems
are using duplicate
settings (CPU31/33-E
only).
More than one Interrupt
Unit is mounted.
Perform the I/O Table Read
operation to check unit
numbers, and eliminate
duplications. (High-density I/O
Units other than Group-2 are
Special I/O Units, too.)
Set unit numbers of 64-pt
Group-2 Units to numbers other
than 9.
Correct the settings.
Mount only one Interrupt Unit.
Input-output I/O table error
I/O SET ERROR
E0 Input and output word
designations registered
in I/O table do no agree
with input/output words
required by Units
actually mounted.
Check the I/O table with I/O
Table Verification operation and
check all Units to see that they
are in correct configuration.
When the system has been
confirmed, register the I/O table
again.
FALS error
SYS FAIL FALS**
01 to 99
or 9F
FALS has been
executed by the
program. Check the FAL
number to determine
conditions that would
cause execution (Set by
user or by system).
Correct according to cause
indicated by FAL number. If FAL
number is 9F, check watchdog
timer and cycle time, which may
be to long. 9F will be output
when FALS(07) is executed and
the cycle time is between 120
and 130 ms.
Error Messages Section 6-4
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