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MELSEC-F
TROUBLESHOOTING11
11 - 17
11.4.2 End codes (Complete codes) returned to an external device during data
communication
This section explains the end codes (complete codes) that are added to responses
when communicating using the fixed buffer or the MC protocol.
For more details on the error codes that are added to responses during
communication using A compatible 1E frames through the MC protocol, see
Subsection 11.4.3.
For more details on the end codes (error codes) that are stored in the buffer memory
of the Ethernet module, see Subsection 11.4.4.
Fixed : Fixed buffer communication MC : Communication using MC protocol
End code Description Processing
Communication function
Fixed MC
00
H • Normal completion -
50
H
• Codes for command/response type of subheader are not within the
specifications.
• In communication using the fixed buffer, if the data length setting is less than the
actual data count, the remaining data is determined as the second data and
processed. In this case, a subheader undefined command type error may occur.
• Check and correct command/
response type set by an
external device.
(The Ethernet module
automatically adds command/
response type; the user does
not need to set these.)
See NOTE in Subsection
11.4.4.
• Check and correct the data
length.
54
H
• When "ASCII code communication" is selected (BFM #24b1: ON) in the
[Communication data code settings] of operational settings parameters of
FX Configurator-EN-L, ASCII code data that cannot be converted to binary code
was received from an external device.
• Check and correct the send
data of the external device.
56
H • Device designation from an external side is incorrect. • Correct the device designated.
57
H
• The number of points for a command designated by an external device exceeds
the maximum number of processing points for each processing (number of
processes that can be executed per communication).
• Head device number to the designated points exceeds the maximum addresses
(device number).
• When performing batch read/write operations on C200 to C255, the address
(device numbers), which was designated with the odd number of points, is
exceeded.
• Correct the designated points
or device number.
• Byte length of a command does not conform to the specifications.
• When writing data, the set number of data points written is different from the
value of the designated number.
• Check the data length of the
command and redo the data
setting.
58
H
• Head device number of a command designated by an external device is set
outside the range that can be designated.
• Designate the appropriate
values within the range that
are allowed for each
processing.
• A word device is designated in a command for bit devices.
• The head number of bit devices is designated by a value other than a multiple of
16 in a command for word devices.
• Correct the command or the
designated device.
5B
H
• The PLC and the Ethernet module cannot communicate.
• The PLC cannot process requests from an external device.
• Fix the faulty parts by referring
to the abnormal codes
appended to the end codes
(see Subsection 11.4.3).
60
H
• Communication time between the Ethernet module and the PLC exceeded PLC
monitoring timer value.
• Increase the monitoring timer
value.
Communication processing
Command/
response type
Communication using fixed buffer 60
H
Communication using MC protocol
00 to 05
H
13 to 16 H