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Error and message Possible correctionProbable causeFAL no.
Too many Units
I/O UNIT OVER
E1
Two or more Special I/O
Units or Group-2
High-density I/O Units
are set to the same unit
number.
Perform the I/O Table Read
operation to check unit
numbers, and eliminate
duplications.
The unit number of a
Special I/O Unit that
requires two words is
set to the last unit
number (9 or F).
Unit numbers of Units that
require two words cannot be set
to the last unit number.
Change the unit number to an
allowed setting.
The I/O number of a
64-pt Group-2
High-density I/O Unit is
set to the last unit
number (9 or F).
Unit numbers of 64-pt Group-2
High-density I/O Units cannot
be set to the last unit number.
Change the unit number to a
valid setting.
Two SYSMAC NET Link
or SYSMAC LINK Units
share the same
operating level.
Check the SYSMAC NET Link
and SYSMAC LINK Unit
operating levels and eliminate
duplications.
Three or more Interrupt
Input Units are mounted.
Up to two Interrupt Input Units
can be mounted.
The unit number of a
Special I/O Unit or
High-density I/O Unit
isn’t within the allowed
setting range.
Set the unit number within the
allowed setting range.
A third Expansion Rack
has been connected to a
PC which can
accommodate only two.
Disconnect the third Rack
unless the PC can
accommodate three Racks.
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 too long.
(Or the previous message may be dis-
played.)
- - - - - - - - - -
- - - - - - - - - -
There is an error in the
CPU.
Turn ON the power again in
PROGRAM mode.
Check the program.
Communications Errors If errors occur in communications, the indicator the peripheral port and RS-232C
port (COMM) will not light. Check the connection, programming on both ends
(C200HX/HG/HE and peripheral), and then reset the port using the reset bit
(RS-232C port: SR 25209).
Other Error Messages A number of other error messages are detailed within this manual. Errors in pro-
gram input and debugging can be examined in Section 4 Writing and Inputting
the Program.
Error Messages Section 9-4