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MELSEC-Q
11 TROUBLESHOOTING
Protocol
Error code
(Hexa-
decimal)
Error
Description
Signal
name
Corrective action
MC
Non
Proce-
dure
Bidire-
ctional
Pre-
defined
7143H Device No. error • The head device No. is out of range. PRO
• Check and correct the external device
transmit message and restart data
communications.
7144H
Monitor data write
error
• Monitoring was requested before the
device to be monitored was written.
PRO
• Write the device to be monitored before
issuing a monitor request.
7145H
Monitor PC No.
error
• The written PC No. and PC No. in the
monitor request are different.
C/N • Rewrite the monitor data.
7146H
Monitor CPU model
name error
• The written CPU model name and the
CPU monitor name in the monitor
request are different.
C/N • Rewrite the monitor data.
7147H
Written number of
monitoring points
overrun error
• The written number of monitoring points
exceeds the designated range.
PRO
• Check and correct the external device
transmit message and restart data
communications.
7148H
Extension R block
No. error
• A nonexistent extension file register
block No. was designated.
• A block No. being used as an extension
comment area, sampling trace area, or
status latch area was designated.
PRO
• Correct the designated block No. and
restart data communications.
7149H System error
• The OS of the Q series C24 detected
some error.
⎯ (1)
714AH
Cannot execute a
command during
RUN
• A write command was designated when
"Disable write during RUN" was set.
• Parameter or sequence program was
written during RUN.
C/N
• Change the setting to "Enable write
during RUN" and restart data
communications.
• Stop the CPU and restart data
communications.
714BH
714CH
System error
• The OS of the Q series C24 detected
some error.
⎯ (
1)
714DH
Unusable command
error
• An unusable command is issued to the
access target CPU.
C/N
• Check and correct the external device
transmit message and restart data
communications.
• If no error is found in the command,
clear the programmable controller CPU
information and retry. (Refer to Section
11.1.7.)
714EH
Monitor network No.
error
• The written monitor network No. and the
monitor request network No. are
different.
C/N
• Check and correct the other station
access valid module No. in the network
parameters.
• Rewrite the monitor data.
7150H System error
• The OS of the Q series C24 detected
some error.
⎯ (
1)
7151H
PC No. designation
error
• A PC No. other than "FF" or "0 to 120
(00
H to 78H)" was designated.
C/N
• Check and correct the external device
transmit message and restart data
communications.
7152H System error
• The OS of the Q series C24 detected
some error.
⎯ (
1)
7153H Frame length error
• The received message length has
exceeded the allowable range.
CHn
ERR.
• Review the transmission message.
• Correct the message format so the
number of access points is within the
allowable range.
7154H System error
• The OS of the Q series C24 detected
some error.
⎯ (1)
7155H
Unwritten monitor
data error
• Monitoring was requested before
monitor data was written.
PRO
• Write the device to be monitored before
issuing a monitor request.
7156H System error
• The OS of the Q series C24 detected
some error.
⎯ (1)
7160H
Programmable
controller access
error
• CPU model name cannot be confirmed. C/N
• If there is an error in the CPU, remove
the CPU error and restart data
communications.
7161H
to
7163
H
System error
• The OS of the Q series C24 detected
some error.
⎯ (
1)
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