9
CJ2H-CPU6
@
-EIP
Self-
diagnosis
and
Restoration
Error Log
A function is provided to store predefined error codes in CPU Unit, error information, and time
at which the error occurred.
CPU Error Detection
CPU Unit WDT errors are detected.
User-defined Failure Diagnosis
Errors can be generated for user-specified conditions: Non-fatal errors (FAL) and fatal errors
(FALS).
Program section time diagnosis and program section logic diagnosis are supported (FPD
instruction).
Load OFF Function
This function turns OFF all outputs from Output Units when an error occurs.
RUN Output
The RUN output from the CJ1W-PA205R turns ON while CPU Unit is in RUN mode or
MONITOR mode.
Basic I/O Load Short-circuit Detection
This function provides alarm information from Basic I/O Units that have load short-circuit
protection.
Failure Point Detection
The time and logic of an instruction block can be analyzes using the FPD instruction.
CPU Standby Detection
This function indicates when the CPU Unit is on standby because all Special I/O Units and
CPU Bus Units have not been recognized at the startup in RUN or MONITOR mode.
Self-
diagnosis
and
Restoration
(Continued
from
previous
page)
Non-fatal Error
Detection
System FAL Error Detection
(User-defined non-fatal error)
This function generates a non-fatal (FAL) error when the user-defined conditions are met in
program.
Duplicate Refreshing Error
Detection
This function detects an error when an immediate refreshing Instruction in an interrupt task is
competing with I/O refreshing of a cyclic task.
Basic I/O Unit Error Detection
This function detects the errors in Basic I/O Units.
Backup Memory Error
Detection
This function detects errors in the memory backup of the user programs and parameter area
(backup memory).
PLC Setup Error Detection
This function detects setting errors in the PLC Setup.
CPU Bus Unit Error Detection
This function detects an error when there is an error in data exchange between the CPU Unit
and a CPU Bus Unit.
Special I/O Unit Error
Detection
This function detects an error when there is an error in data exchange between the CPU Unit
and a Special I/O Unit.
Tag Memory Error Detection
This function detects errors in tag memory.
Battery Error Detection
This function detects an error when a battery is not connected to the CPU Unit or when the
battery voltage drops.
CPU Bus Unit Setting Error
Detection
This function detects an error when the model of a CPU Bus Unit in the registered I/O tables
does not agree with the model that is actually mounted in the PLC.
Special I/O Unit Setting Error
Detection
This function detects an error when the model of a Special I/O Unit in the registered I/O tables
does not agree with the model of Unit that is actually mounted.
Fatal Error
Detection
Memory Error Detection
This function detects errors that occur in memory of the CPU Unit.
I/O Bus Error Detection
This function detects when an error occurs in data transfers between the Units mounted in
Rack slots and the CPU Unit and detects when the End Cover is not connected to the CPU
Rack or an Expansion Rack.
Unit/Rack Number
Duplication Error
This function detects an error when the same unit number is set for two or more Units, the
same word is allocated to two or more Basic I/O Units, or the same rack number is set for two
or more Racks.
Too Many I/O Points Error
Detection
This function detects an error when the total number of I/O points set in the I/O tables or the
number of Units per Rack exceeds the specified range.
I/O Setting Error Detection
This function detects an error when the number of Units in the registered I/O tables does not
agree with the actual number of Units that is mounted, or an Interrupt Unit has been connected
in the wrong position, i.e., not in slot 0 to 3.
Program Error Detection
This function detects errors in programs.
Instruction Processing
Error Detection
This function detects an error when the given data value is invalid when executing an
instruction, or execution of instruction between tasks was attempted.
Indirect DM/EM BCD
Error Detection
This function detects an error when an indirect DM/EM address in BCD mode is not BCD.
Illegal Area Access Error
Detection
This function detects an error when an attempt is made to access an illegal area with an
instruction operand.
No END Error Detection
This function detects an error when there is no END instruction at the end of the program.
Task Error Detection
This function detects an error when there are no tasks that can be executed in a cycle, there
is no program for a task, or the execution condition for an interrupt task was met but there is
no interrupt task with the specified number.
Differentiation Overflow
Error Detection
This function detects an error when too many differentiated instructions are entered or deleted
during online editing (131,072 times or more).
Invalid Instruction Error
Detection
This function detects an error when an attempt is made to execute an instruction that is not
defined in the system.
User Program Area
Overflow Error Detection
This function detects an error when instruction data is stored after the last address in user
program area.
Cycle Time Exceeded Error
Detection
This function monitors the cycle time (10 to 40,000 ms) and stops the operation when the set
value is exceeded.
Function
Description