End Codes Returned To A Connected Device During Data Communications - Mitsubishi Electric MELSEC-L SERIES Basic User Manual

16.7.1
End codes returned to a connected device during data
communications
The following table lists the error codes stored in the end code appended to a response during data communications.
Error
Error description
code
00
• Normal completion
H
• The device range destination of
02
devices to be read/written from/to is
H
incorrect.
• Codes for the command/response
type of a subheader are not within the
specifications.
MC protocol communications: 00
3C
H
Communications using a fixed buffer:
60
H
Communications using a random access
50
H
buffer: 61 , 62
H H
• In communications using a fixed
buffer, if the data length setting is
smaller than the actual data amount,
the remaining data is processed as the
second data. In this case, a subheader
undefined command type error may
occur.
• In communications using a random
access buffer, the start address
51
specified by a connected device has
H
been set outside the range from 0 to
6143.
• In communications using a random
access buffer, the start address and
the number of data words (depending
on the setting when reading data)
specified by a connected device
52
exceeds the range from 0 to 6143.
H
• Data by the number of words specified
(text) cannot be sent in one frame.
(The data length value or the amount
of the text sent/received are not in the
allowable range.)
268
Action
When each
communication is
normally completed, the
error code 00 is stored.
H
• Check and correct the
specified start device
and the number of
points.
• Check and correct the
to
command/response
H
type set for the
connected device.
(Because the E71
automatically adds
the
command/response
type, the user setting
is not required.)
• Check and correct the
data length.
• Check and correct the
specified start
address.
• Check and correct the
start address and the
number of data
words.
• Correct the number of
read/write points.
: Stored in the end code appended to a response
Data communication type
Communications
MC protocol
using a fixed
communications
buffer
 

 

Communications
using a random
access buffer



