Mitsubishi Electric Q03UDVCPU User Manual page 66

(2) When A-compatible 1E frame is used
An end code and abnormal code are added to a response in MC protocol communication that uses A-compatible
1E frames.
When the end code is a value other than "5B
Response format
When the end code is "5B
Response format
(a) End codes
End code
00
Data is communicated successfully.
H
When the communication data code setting is set to ASCII code in the Built-in Ethernet
54
H
port QCPU, ASCII code data that cannot be converted to binary code was received.
When the setting for online change is disabled on the Built-in Ethernet port tab of PLC
55
parameter in GX Developer, an external device requested online change to the CPU
H
module.
56
An external device specified the incorrect device.
H
• The number of points for a command specified by an external device exceeds the
maximum number of processing points (number of points can be processed per
communication) for each processing.
• The number of points specified from the start address (start device number) exceeds
57
H
the maximum address (maximum device number) for each processing.
• The length of a command message is too short to analyze.
Monitoring was requested without monitor data being registered.
The start address (start device number) of a command specified by an external device
exceeds the setting range.
The file register (R) cannot be specified.
58
H
• A word device is specified in a command for bit devices.
• In a command for word devices, the start number of a bit device is specified by a value
other than a multiple of 16.
5B
The CPU module cannot process requests from an external device.
H
(b) Abnormal codes
If the end code is "5B
abnormal codes to be attached, error details, and required actions.
Abnormal code
4000
H
CPU detected error (Error that occurred in other than communication using the MC
to
protocol)
4FFF
H
C080 PC number of another station (01
H
The communication target port is in the remote password locked status. Or, when the
C201
communication data code setting is set to ASCII code, any data of subcommands and
H
later cannot be converted to binary code since the remote password is locked.
64
"
H
Subheader
"
H
Subheader
Description
," an abnormal code is attached immediately after the code. The following table lists the
H
Description
to 80 is specified.
)
H H
End code 0000
End code Abnormal code
"5B "
An abnormal code is stored.
H
H
Corrective action
-
Correct the send data on the external
device side.
• Enable online change and write data.
• Change the status of the CPU module to
STOP and write data.
Specify the device correctly.
• Correct the number of points specified or
the start address (start device number).
• Check the command.
Register the monitor data.
Correct the start address within the setting
range for each processing.
Check the device.
Correct the command or the specified
device.
Identify an error location according to the
abnormal code and correct the error.
Corrective action
Refer to the following manual.
QCPU User's Manual (Hardware
Design, Maintenance and Inspection)
Specify the PC number of own station
(FF ).
H
Perform remote password unlock
processing before communication.