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APPENDIX
Appendix 3 Error Code
279
A
3057H System bus error • A timeout occurred during
communication with a connected module
when an instruction was executed.
• Verify that extension cables are correctly
connected.
• Verify that the version of the CPU module is
compatible with the module where the error
was detected.
• Implement anti-noise measures.
• If there is no problem, there may be a
malfunction in the connected module or in
the extension cables.
System
configuration
information
At END
instruction
execution, at
interrupt
occurrence,
at module
access
3060H System bus error • A signal error was detected while
accessing a connected module when an
instruction was executed.
• Verify that extension cables are correctly
connected.
• Verify that the version of the CPU module is
compatible with the module where the error
was detected.
• Implement anti-noise measures.
• If there is no problem, there may be a
malfunction in the connected module or in
the extension cables.
Error location
information
At instruction
execution
3061H System bus error • A signal error was detected during
system processing.
• Verify that extension cables are correctly
connected.
• Verify that the version of the CPU module is
compatible with the module where the error
was detected.
• Implement anti-noise measures.
• If there is no problem, there may be a
malfunction in the connected module or in
the extension cables.
System
configuration
information
At instruction
execution
3142H Program
structure error
• The temporary area was used
incorrectly.
• Check the detailed information (error
location information) of the error by
executing module diagnostics using the
engineering tool, display the error program
(step) by clicking the [Error Jump] button,
and check the program. The step number
displayed in the error location information is
counted from the top of the file. (It may be
different from the step number in the
program displayed by the jump function.)
Error location
information
At instruction
execution
3200H Program
execution error
• The device/label assignment does not
match the device/label assignment in the
program. (After the device assignment
was changed, only the parameters were
written to the CPU module.)
• If the index modification setting of the PLC
parameter is changed, write the parameter
and program file to the CPU module at the
same time.
Drive/file
information
At power-on,
at RESET
3202H Program
execution error
• The program file is invalid or the file does
not contain a program.
• Write the correct program file. Drive/file
information
At power-on,
at RESET
3203H Program
execution error
• No program file exists. • Write a program file. Drive/file
information
At power-on,
at RESET
3210H Program
execution error
• A program with more than 64 k steps
was written.
• Reduce the number of steps in the program. At power-on,
at RESET
3211H Program
execution error
• An FB program larger than the internal
memory capacity was written.
• Reduce the number of steps in the FB
program.
At po
wer-on,
at RESET
3212H Program
execution error
• No program setting is found in the
parameters.
• Specify the program to execute in the
parameters.
At power-on,
at RESET
3213H Program
execution error
• The parameter set value is out of range. • To use this parameter, a new version of the
CPU module is required. Replace the CPU
module or perform version upgrade.
Parameter
information
At power-on,
at RESET
3302H Pointer setting
error
• Duplicate pointers are programmed. • Modify the program to not use duplicate
pointers in a program.
Error location
information
At power-on,
at RESET
3320H Interrupt pointer
setting error
• Duplicate interrupt pointers are
programmed.
• Modify the program to not use duplicate
interrupt pointers in a program.
Error location
information
At power-on,
at RESET
3340H FOR-NEXT
instruction error
• The relationship between FOR and
NEXT instructions is invalid.
• Make sure that FOR and NEXT instructions
are each executed the same number of
times. In addition, check the FOR syntax for
any invalid jump instructions.
Error location
information
At END
instruction
execution
Error
code
Error name Error details and cause Action Detailed
information
Diagnostic
timing