12
TROUBLESHOOTING
12.5 Error codes returned to request source during communication with CPU module
12
- 65
9
EM
C AN
D
LO
W
VOL
TA
G
E
DI
RE
C
T
IVES
10
LO
ADING A
N
D
INST
AL
LA
TION
11
M
A
INTE
NA
NCE
AND
IN
SPE
CTI
O
N
12
TR
OU
BL
ESH
OO
TIN
G
A
P
P
E
NDICE
S
INDE
X
Table12.9 Error code (Continue)
Error code
(Hexadecimal)
Error item
Error details
Corrective action
42AD
H
Already started
in the same
starting source
The online operation started before is in the
continued status due to some reason (e.g.
communication disturbance during execution,
etc.).
Start the online operation forcibly.
Redo the online operation from the beginning.
42AE
H
CRC read
disabled
An attempt was made to read the CRC value
to the file in which the CRC value is not stored.
• Execute PLC memory format.
• Execute PLC memory initialization.
42AF
H
During history
data update
The history file read cannot be started since
the history data update is during execution in
the CPU module.
Execute the read again after a while.
42B0
H
Communica-
tion error
between CPUs
The communication between CPU A and CPU
B failed.
The CPU module may be faulty.
Restart the CPU module.
42B1
H
CPU access
password
cannot be
written
Writing the CPU access password failed.
Write the CPU access password again.
If the same error occurs again, it is a CPU hardware
failure. Please consult your local Mitsubishi service
center or representative, explaining a detailed
description of the problem.
42B2
H
ROM marking
information
cannot be
written
A write error to flash ROM occurred while
program memory data is written to ROM.
Write program memory data to ROM again.
If the same error occurs again, it is a CPU hardware
failure. Please consult your local Mitsubishi service
center or representative, explaining a detailed
description of the problem.
42B3
H
Program
memory data
cannot be
written to ROM
A write error to flash ROM occurred while
program memory data is written to ROM.
Write program memory data to ROM again.
If the same error occurs again, it is a CPU hardware
failure. Please consult your local Mitsubishi service
center or representative, explaining a detailed
description of the problem.
42B4
H
Command
execution
results
mismatch
The results of executed functions are different
between CPU A and CPU B.
Execute the function which became an error again.
If the same error occurs again, it is a CPU hardware
failure. Please consult your local Mitsubishi service
center or representative, explaining a detailed
description of the problem.
42B5
H
Command that
cannot be
executed in
the specified
transfer target
The online operation that can be executed
only without the transfer target specification is
executed to CPU A or CPU B.
Execute the online operation again after switching the
transfer target to "Not specified".
42B6
H
CPU access
password
damaged
The CPU access password stored in the CPU
module is damaged.
Write the CPU access password again after PLC
memory initialization.
If the same error occurs again, it is a CPU hardware
failure. Please consult your local Mitsubishi service
center or representative, explaining a detailed
description of the problem.
42B7
H
Illegal user
name
Characters other than ASCII characters are
used for the user name.
Check whether the characters other than ASCII
characters (20 to 7E
H
) are used for the login user name.
42B8
H
Program size
mismatch
The program size stored in the program
memory is different from that of the running
program.
Restart the CPU module.
If the same error occurs again, it is a CPU hardware
failure. Please consult your local Mitsubishi service
center or representative, explaining a detailed
description of the problem.
