Mitsubishi MELSEC LJ71C24, User Manual

Page: 294 / 428

15 - 25 15 - 25
15 TROUBLESHOOTING
Protocol
Error code
(Hexa-
decimal)
Error
Description
Signal
name
Corrective action
MC
Non-
proce-
dural
Bi-
direc-
tional
Pre-
defined
•
Writing to the flash ROM failed.
⎯
or
7E57
H
Flash ROM write
error
•
Power is turned off during writing to
Flash ROM.
CHn
ERR.
•
Re-execute the write operation.
•
If the error occurs after rewriting,
replace the module.
7E58
H
Mode modification
error
•
There is an error in the mode No. or
transmission specifications after
changing the mode. PRO.
•
Check and correct the external device’s
transmit message and restart data
communications.
•
Check the switch setting.
•
Writing to flash ROM was performed
1000 times after power-on.
⎯
or
•
Review the program.
•
Write “0” to the Flash ROM write count
area (address: 2401
H
) in the buffer
memory and restart data
communications. 7E59
H
Flash ROM write
count over limit error
•
Writing to flash ROM was performed
100,000 times.
CHn
ERR.
•
When the number of writes reached
100,000, replace the module.
7E5E
H
Programmable
controller CPU
monitoring function
registration error
•
The programmable controller CPU
monitoring function is registered for the
communication protocol that does not
support the function. CHn
ERR.
•
Correct the communication protocol
setting.
7E5F
H
I/O number error on
requested module
•
I/O number of requested module is
incorrect.
⎯
•
Correct the I/O number of the module to
which data is sent.
7E60
H
Device monitoring
duplicate registration
error
•
Programmable controller CPU
monitoring registration was performed
twice.
⎯
•
Cancel the programmable controller
CPU monitoring and perform the
programmable controller CPU
monitoring registration again.
7E61
H
Cycle time units
range error
•
Cycle time units setting is out of range.
⎯ •
Correct the cycle time units setting.
7E62
H
Programmable
controller CPU
monitoring function
error
•
Setting of the programmable controller
CPU monitoring function is out of range.
⎯
•
Correct the setting of the programmable
controller CPU monitoring function.
7E63
H
Transmission
measure setting
error
•
Incorrect transmission method is set for
the programmable controller CPU
monitoring.
⎯
•
Correct the setting of the transmission
method for the programmable controller
CPU monitoring.
7E64
H
Registration point
range error
•
Registration point (word/bit) is out of
range.
⎯
•
Correct the number of registration
points (word/byte).
7E65
H
Programmable
controller CPU
abnormality
monitoring number
error
•
Setting of the programmable controller
CPU abnormality monitoring is out of
range.
⎯
•
Correct the setting of the programmable
controller CPU abnormality monitoring.
7E66
H
Monitoring condition
error of monitoring
device
•
Setting of the monitoring condition is out
of range.
⎯ •
Correct the monitoring condition.
7E67
H
Programmable
controller CPU
abnormality
monitoring error
•
The programmable controller CPU
abnormality monitoring setting (fixed
value) is out of range.
⎯
•
Correct the programmable controller
CPU abnormality monitoring setting
(fixed value).
7E68
H
Transmission
condition range error
of monitoring device
•
The transmission condition (condition
agreement transmission) setting is out
of range.
⎯
•
Correct the transmission condition
(condition agreement transmission).
7E69
H
Programmable
controller CPU
abnormality
monitoring error
•
The programmable controller CPU
abnormality monitoring setting (fixed
value) is out of range.
⎯
•
Correct the programmable controller
CPU abnormality monitoring setting
(fixed value).
7E6A
H
Monitoring device
read point range
error
•
Read points of monitoring device is out
of range.
⎯
•
Correct the monitoring device read
points.
7E6B
H
⎯
7E6C
H
⎯
7E6D
H
Programmable
controller CPU
abnormality
monitoring error
•
The programmable controller CPU
abnormality monitoring setting (fixed
value) is out of range.
⎯
•
Correct the programmable controller
CPU abnormality monitoring setting
(fixed value).