Appendices
A-138
CJ2 CPU Unit Software User’s Manual
A402 A402.04 Battery Error
Flag
(Non-fatal error)
ON if the CPU Unit's battery is disconnected or its voltage is low
and the Detect Battery Error setting has been set in the PLC
Setup.
The CPU Unit will continue operating and the ERR/ALM indicator
on the front of the CPU Unit will flash.
ON: Error
OFF: No error
This flag will be turned OFF when the error is cleared.
This flag can be used to control an external warning light or other
indicator to indicate that the battery needs to be replaced.
Cleared Cleared PLC Setup (Detect
Battery Error)
A402.06 Special I/O Unit
Error Flag
(Non-fatal error)
ON when an error occurs in a data exchange between the CPU
Unit and a Special I/O Unit (including an error in the Special I/O
Unit itself).
The CPU Unit will continue operating and the ERR/ALM indicator
on the front of the CPU Unit will flash. The Special I/O Unit where
the error occurred will stop operating.
ON: Error
OFF: No error
This flag will be turned OFF when the error is cleared.
The unit number of the Unit where the data exchange error
occurred is indicated in A418 through A423.
Cleared Cleared A418 to A423
A402.07 CPU Bus Unit
Error Flag
(Non-fatal error)
ON when an error occurs in a data exchange between the CPU
Unit and an CPU Bus Unit (including an error in the CPU Bus Unit
itself).
The CPU Unit will continue operating and the ERR/ALM indicator
on the front of the CPU Unit will flash. The CPU Bus Unit where
the error occurred will stop operating.
ON: Error
OFF: No error
This flag will be turned OFF when the error is cleared.
The unit number of the Unit where the data exchange error
occurred is indicated in A417.
Cleared Cleared A417
A402.10 PLC Setup Error
Flag
(Non-fatal error)
ON when there is a setting error in the PLC Setup. The CPU Unit
will continue operating and the ERR/ALM indicator on the front of
the CPU Unit will flash. The location of the error will be written to
A406.
ON: Error
OFF: No error
This flag will be turned OFF when the error is cleared.
It will also turn OFF for a setting error for synchronous unit opera-
tion settings if correct settings are transferred to the Synchronous
Unit.
Cleared Cleared A406
A402.12 Basic I/O Unit
Error Flag
(Non-fatal error)
ON when an error has occurred in a Basic I/O Unit.
The CPU Unit will continue operating and the ERR/ALM indicator
on the front of the CPU Unit will flash.
ON: Error
OFF: No error
This flag will be turned OFF when the error is cleared.
The location of the error will be written to A408.
Cleared Cleared A408
A402.13 Duplicate
Refresh Error
Flag
(Non-fatal error)
ON when the Detect Duplicate Refresh Errors parameter in the
PLC Setup is set to detect duplicate refresh errors and one of the
following occurs for the same Special I/O Unit.
• FIORF(225), IORF(097), IORD(222) or IOWR(223) in a cyclic
task is competing with FIORF(225), IORF(097), IORD(222) or
IOWR(223) in an interrupt task.
• FIORF(225), IORF(097), IORD(222) or IOWR(223) was exe-
cuted in an interrupt task when I/O was being refreshed.
If cyclic refreshing is not disabled in the PLC Setup for a Special
I/O Unit and FIORF(225), IORF(097), IORD(222) or IOWR(223) is
executed for the same Special I/O Unit in an interrupt task, a
duplicate refresh error will occur.
Cleared Cleared A426,
PLC Setup
(Detect Duplicate
Refresh Errors
parameter in the
PLC Setup is set to
“Detect”)
Address
Name Function
Status
after mode
change
Status at
startup
Write timing/
Related flags, set-
tings
Words Bits
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