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APPENDIX
Appendix 3 Error Code
277
A
2301H Security key
authentication
error
• The program is locked by the security
key, but the security key is not written in
the CPU module.
• Write the security key to the CPU module. Drive/file
information
At power-on,
at RESET, at
STOP
RUN state
2302H Security key
authentication
error
• The security key written in the CPU
module is corrupted.
• Rewrite the security key to the CPU module. At power-on,
at RESET, at
STOP
RUN state
2320H Remote
password setting
error
• A module supporting remote passwords
is not connected to the module number
specified in the remote password
parameter.
• Recheck the remote password parameter
setting or module configuration.
System
configuration
information
At power-on,
at RESET
2400H Module
verification error
• The power of a module connected is
OFF or a connection error has been
detected.
• Verify that the connected module is powered
on.
• Verify that extension cables are correctly
connected.
• Implement anti-noise measures.
• If there is no problem, there may be a
malfunction in the connected module.
Replace the connected module.
System
configuration
information
Always
2401H Module
verification error
• A module was connected during
operation.
• Avoid connecting a module during operation. System
configuration
information
Always
2440H Module major
error
• The communication procedure with a
module failed during initial 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.
• If the version of the CPU module is correct,
there may be a malfunction in the connected
module. Replace the connected module.
System
configuration
information
At power-on,
at RESET
2441H Module major
error
• The communication procedure with a
module failed when an instruction was
executed.
• Review the program and check the contents
of the operands used in the applied
instructions.
• Verify that the specified buffer memory exists
in the counterpart equipment.
• Verify that extension cables are correctly
connected.
Error location
information
and system
configuration
information
At instruction
execution
2500H WDT error • The initial scan time exceeded the set
value of execution monitor time.
• Recheck the set value of execution monitor
time or program.
Time
information
Always
2501H WDT error • The scan time of the second and
subsequent scans exceeded the set
value of execution monitor time.
• Recheck the set value of execution monitor
time or program.
Time
information
Always
25
22H Invalid interrupt • An interrupt request was detected from a
module that does not have an interrupt
pointer specified in the parameters.
• Correctly set the interrupt pointer for module
interrupt.
System
configuration
information
At interrupt
occurrence
2801H Module
specification
error
• Verify that the module with the specified
module number exists.
• Specify the correct module number. Error location
information
and system
configuration
information
At instruction
execution
2820H Device
specification
error
• A device used as an instruction operand
is outside the allowable device range.
• Check the device range and modify the
program.
Error location
information
At power-on,
at RESET, at
instruction
execution
2821H Device
specification
error
• There are duplicate devices used as an
instruction operand.
• Check the range of devices used by each
operand and modify the program.
Error location
information
At instruction
execution
2822H Device
specification
error
• A device or modification that cannot be
used as an instruction operand is used.
• Check the usage of the instruction and
modify the program.
Error location
information
At power-on,
at RESET
Error
code
Error name Error details and cause Action Detailed
information
Diagnostic
timing