27 TROUBLESHOOTING
27.4 Error Code List
477
27
7D11H Protocol
simultaneous
execution error
• The CPRTCL instruction
and 'CH1 protocol
execution request' (Y3) or
'CH2 protocol execution
request' (YA) were
executed simultaneously
on the same channel.
CHn
ERR.
• Correct the program not to
execute the CPRTCL
instruction and 'CH1 protocol
execution request' (Y3)/'CH2
protocol execution request'
(YA) simultaneously on the
same channel.
7D12H Send monitoring
time timeout error
• Send monitoring time has
timed out.
Although the transmission
was retried the specified
number of retries, it did not
succeed.
CHn
ERR.
• Check if the transmission is
interrupted due to some
reasons such as DTR control.
• Check whether the CS signal
is ON.
• Check if the cables are
disconnected.
7D13H Receive wait
timeout error
• Receive wait time has
timed out.
CHn
ERR.
• Check if the reception is
interrupted due to some
reasons such as DTR control.
• Check if the cables are
disconnected.
• Check if any errors occur on
the target device side.
■Using the circuit trace function
(send/receive data monitoring
function), check if;
• Transmissions from the target
device are interrupted.
• Any data are missing due to a
data reception error.
• The data (packet) sent from
the target device is incorrect.
7D14H Response
monitoring
timeout error
• Response monitoring time
(timer 1) has timed out
during data transmission.
• Data to be sent to the
target device was not
obtained from the CPU
module within the
response monitoring time
(timer 1).
CHn
ERR.
• Increase the setting value for
the response monitoring time
(timer 1). (Default: 5 seconds)
• If an error occurred on the
CPU module, refer to the
following manual.
(MELSEC iQ-R CPU
Module User's Manual
(Application))
7D15H Response
monitoring
timeout error
• Response monitoring time
(timer 1) has timed out
during data reception.
• Data received from the
target device was not
stored into the CPU
module within the
response monitoring time
(timer 1).
CHn
ERR.
• Increase the setting value for
the response monitoring time
(timer 1). (Default: 5 seconds)
• If an error occurred on the
CPU module, refer to the
following manual.
(MELSEC iQ-R CPU
Module User's Manual
(Application))
7D1
6H Protocol cancel
request error
• A cancel request was
accepted during protocol
execution, and the
CPRTCL instruction was
completed abnormally.
• The CPRTCL instruction
was completed
abnormally because
protocol setting data were
written during CPRTCL
instruction execution.
• The STOP RUN
operation was performed
on the CPU module.
CHn
ERR.
• Check the cancelled
Predefined protocol in the
CPRTCL instruction's control
data (number of executions),
and eliminate the cause of the
cancellation.
• Clear the error information by
the 'Error initialization request'
(YE) as necessary.
• To prevent coincidental
execution of the CPRTCL
instruction, set the CPU
module in the STOP state
before writing the protocol
setting data.
• Execute the CPRTCL
instruction again.
Error code
(hexadecima
l)
Error Description Signal
name
Corrective action Protocol
MC Nonpr
ocedu
ral
Bidire
ctiona
l
Prede
fined
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