508
Error Processing Section 11-2
If the IOM Hold Bit hasn’t been turned ON to protect I/O memory, all non-
retained areas of I/O memory will be cleared when a fatal error other than
FALS(007) occurs. When the IOM Hold Bit is ON, the contents of I/O memory
will be retained but all outputs will be turned OFF.
Error Program-
ming
Console
display
Error
code (in
A400)
Flag and
word data
Probable cause Possible remedy
Memory
error
MEMORY
ERR
80F1 A40115:
Memory
Error Flag
A403:
Memory
Error Loca-
tion
An error has occurred in
memory. A bit in A403 will
turn ON to show the location
of the error as listed below.
See below.
A40300 ON:
A checksum error has
occurred in the user program
memory. The power was
turned OFF while storing data
to the flash memory (backup
memory).
Check the program and correct the
error.
A40304 ON:
A checksum error has
occurred in the PLC Setup.
Clear the entire PLC Setup to 0000 and
reenter the settings.
A40305 ON:
A checksum error has
occurred in the registered I/O
table.
Initialize the registered I/O table and
generate a new I/O table.
A40307 ON:
A checksum error has
occurred in the routing tables.
Initialize the routing tables and reenter
the tables.
A40308 ON:
A checksum error has
occurred in the CPU Bus Unit
setup.
Initialize the CPU Bus Unit setup and
reenter the settings.
A40309 ON:
An error occurred during
automatic transfer from the
Memory Card at startup.
Make sure that the Memory Card is
installed properly and that the correct
file is on the Card.
A40310 ON:
An error occurred in flash
memory (backup memory).
CPU Unit hardware is faulty. Replace
the CPU Unit.
I/O Bus
error
I/O BUS
ERR
80C0 to
80CE or
80CF
A40114: I/O
Bus Error
Flag
A404: I/O
Bus Error
Slot and
Rack Num-
bers
Error has occurred in the bus
line between the CPU and I/O
Units or the End Cover is not
connected to the CPU Rack
or an Expansion Rack.
A40400 to A40407 contain
the error slot number (00 to
09) in binary. 0F hex indicates
that the slot cannot be deter-
mined. 0E hex indicates the
End Cover is not connected
to the CPU Rack or an
Expansion Rack.
A40408 to A40415 contain
the error rack number (00 to
03) in binary. 0F hex indicates
that the rack cannot be deter-
mined. 0E hex indicates the
End Cover is not connected
to the CPU Rack or an
Expansion Rack.
Try turning the power OFF and ON
again.
If the error isn’t corrected, turn the
power OFF and check cable connec-
tions between the I/O Units and Racks
and the End Covers.
Check for damage to the cable or Units.
Turn the Rack’s power supply OFF and
then ON again.
To Next Page
Loading...
