Mitsubishi Electric MELSEC-L Series - Abnormal Codes Returned During Communications Using an A-Compatible 1 E Frame

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16.7.2 Abnormal codes returned during communications using an A-
compatible 1E frame
The following table lists the error codes stored in the abnormal code appended to a response in the A-compatible 1E
frame in MC protocol communications. (An abnormal code is appended only when an end code is 5B
H
.)
Error
code
Error Error description Action
10
H
PC number error
The PC number specified with a command is not
FF of the own station or not the station number set
with the MELSECNET link parameters.
Change the PC number to FF
H
of the own station
or not the station number set using the link
parameter to perform communications again.
11
H
Mode error
After the E71 receives a request from the
connected device normally, communications
cannot be normally performed between the E71
and the CPU module due to some causes such as
noise.
Perform communications again. If the error occurs
again, check for noise and other causes and/or
replace the E71.
12
H
Intelligent function
module designation
error
The specified intelligent function module number
has not been assigned to an intelligent function
module that has the buffer memory and where
communications can be performed. (For example,
the specified module is an I/O module or empty.)
Change the specified data contents in the control
procedure or change the connecting position of the
intelligent function module. Then perform
communications again.
18
H
Remote error
The remote RUN/STOP cannot be executed. (The
remote STOP/PAUSE has been already executed
from another module.)
Check if the remote STOP/PAUSE has been
already executed from another module. Then
cancel the operation to perform communications
again.
1F
H
Device error Invalid device specification
• Correct the specified device.
• Do not access a device which does not exist.
20
H
Link error
The CPU module of the request destination has
been disconnected from the data link.
Check if the CPU module of the station number set
for the PC number has been disconnected. Then
remove the cause of the disconnection to perform
communications again.
21
H
Intelligent function
module bus error
Memory access to the intelligent function module
cannot be performed due to the following causes:
• The control bus to the intelligent function module
is faulty.
• The intelligent function module is in failure.
There is a hardware problem with the CPU
module, intelligent function module, or the E71.
Please consult your local Mitsubishi
representative.
Response format Subheader End code Abnormal code 00H
If an abnormal code is stored,
"5B
H" is stored here.