Error Codes For Mc Protocol Communication - Mitsubishi MELSEC L Series User Manual

5.4

Error Codes for MC Protocol Communication

When an error occurs during MC protocol communication, an errror code is sent from the CPU module to the external
device. The following table lists error codes, error descriptions, and corrective actions.
Error code
(Hexadecimal)
Errors detected by the CPU module
4000 to 4FFF
H H
(Errors occurred in other than MC protocol communication)
Although online change is disabled, the connected device
0055
H
requested the RUN-state CPU module for data writing.
When "Communication Data Code" is set to ASCII Code, ASCII
C050
H
code data that cannot be converted to binary were received.
C051 to C054 The number of read or write points is outside the allowable range.
H H
C056 The read or write request exceeds the maximum address.
H
The request data length after ASCII-to-binary conversion does not
C058
H
match the data size of the character area (a part of text data).
• The command and/or subcommand are specified incorrectly.
C059 • The CPU module does not support the command and/or
H
subcommand.
The CPU module cannot read data from or write data to the
C05B
H
specified device.
The request data is incorrect. (e.g. reading or writing data in units of
C05C
H
bits from or to a word device)
C05D No monitor registration
H
C05F The request cannot be executed to the CPU module.
H
The request data is incorrect. (ex. incorrect specification of data for
C060
H
bit devices)
The request data length does not match the number of data in the
C061
H
character area (a part of text data).
The CPU module received a request message in ASCII format
when "Communication Data Code" is set to Binary Code, or
C06F received it in binary format when the setting is set to ASCII Code.
H
(This error code is only registered to the error history, and no
abnormal response is returned.)
The device memory extension cannot be specified for the target
C070
H
station.
C0B5 The CPU module cannot handle the data specified.
H
C200 The remote password is incorrect.
H
The port used for communication is locked with the remote
password.
C201 Or, because of the remote password lock status with
H
"Communication Data Code" set to ASCII Code, the subcommand
and later part cannot be converted to a binary code.
The connected device is different from the one that requested for
C204
H
unlock processing of the remote password.
Description
CHAPTER 5 MC PROTOCOL COMMUNICATION
Corrective action
Refer to the following manual.
MELSEC-L CPU Module User's Manual (Hardware Design,
Maintenance and Inspection)
• Before enabling online change, write the data.
• Change the CPU module state to STOP and write the data.
• Select Binary Code for "Communication Data Code", and restart
the CPU module.
• Correct the send data of the connected device and resend the
data.
Correct the number of read or write points, and resend the data to
the CPU module.
Correct the start address or the number of read or write points, and
resend the data to the CPU module.
(The maximum address must not be exceeded.)
Check and correct the text data or the request data length of the
header, and resend the data to the CPU module.
• Check the request.
• Use commands and/or subcommands supported by the CPU
module.
Check the device to be read or written.
Correct the request data and resend it to the CPU module.
(e.g. subcommand correction)
Perform monitor registration before monitoring.
• Correct the network number, PC number, request destination
module I/O number, or request destination module station
number.
• Correct the read/write request data.
Correct the request data and resend it to the CPU module.
Check and correct the text data or the request data length of the
header, and resend the data to the CPU module.
• Send a request message that matches the "Communication Data
Code" setting.
• Change the "Communication Data Code" setting so that it will
match the request message.
Read data from or write data to the device memory without
specifying the extension.
• Correct the request data.
• Stop the current request.
Correct the remote password, and unlock and lock the remote
password function again.
Unlock the remote password before communication.
From the device that requested the unlock processing, request for
lock processing of the remote password.
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