Mitsubishi Melsec-L Series User Manual page 290

Error code
Error
(Hexa-
decimal)
7164 Request error
H
7166 System error
H
7167 Cannot execute a
H
command during
RUN
7168
H
7169 CPU module error
H
716A
H
to System error
716C
H
716D
H
Monitor data write
error
716E
H
716F Device error
H
7170
H
A compatible 1C
7171
H
frame error
7172
H
Monitor data write
7173
H
error
Protocol No. setting
7D00
H
error
Continuous protocol
7D01 execution count
H
setting error
Protocol not-ready
7D02
H
error
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Description
• Either the request or the device
designation method is wrong.
• The OS of the C24 detected some
error.
• A write command was designated when
disable online change was set.
• A command that cannot be executed
during RUN was designated.
• Cannot communicate normally with the
CPU module.
• The OS of the C24 detected some
error.
• Monitor data was not written using QnA
compatible 2C/3C/4C frame.
• Monitor data was not written using A
compatible 1C frame.
• A nonexistent device was designated.
• Device that cannot be specified by the
corresponding command was
designated.
• Number of access points exceeded the
range.
• A device that cannot be designated was
designated.
• Written number of monitoring points is
incorrect. For example, [0] was
designated.
• Monitor data was written for a CPU
other than a Q/L/QnACPU using QnA
compatible 2C/3C/4C frame.
• In control data of the CPRTCL
instruction, the protocol No. is out of
range.
• The number of protocols to be executed
continuously, which is specified with an
argument in the CPRTCL instruction, is
out of range.
• The CPRTCL instruction was executed
while Predefined protocol ready (X1D)
is OFF.
• The CPRTCL instruction was executed
during protocol setting data writing.
• The CPRTCL instruction was executed
with abnormal protocol setting data.
Signal
Corrective action
name
• Check the transmission
message/request from the external
⎯
device, make the necessary
corrections, and send again.
⎯
( 1)
• Change the setting to enable online
change and restart data
C/N communications.
• Set the CPU module to STOP, and retry
communications.
• Stop the CPU module and restart data
C/N
communications.
• If there is an error in the CPU module,
C/N remove the CPU error and restart data
communications.
⎯
( 1)
PRO.
• Rewrite monitor data.
PRO.
PRO.
• Check and correct the external device
PRO.
transmit message and restart data
communications.
PRO.
PRO.
• For a CPU other than Q/L/QnACPU,
PRO. use the A compatible 1C frame to write
the monitor data.
CHn
• Correct the protocol No.
ERR.
• Correct the number of protocols to be
CHn
ERR. executed continuously.
• Confirm Predefined protocol ready
(X1D) turned ON before executing the
CPRTCL instruction.
• Do not execute the CPRTCL instruction
during writing of protocol setting data.
CHn (Set the CPU module to STOP before
ERR. writing protocol setting data.)
• Write the protocol setting data again to
the C24, and then execute the CPRTCL
instruction.
• If this error persists even after rewriting,
replace the module.
15 TROUBLESHOOTING
Protocol
Non- Bi-
Pre-
MC proce- direc-
defined
dural tional
15 - 21