End Codes Returned To A Connected Device During Data Communications - Mitsubishi Electric QJ71E71-100 User Manual

16.6.1
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 devices
02
H
to be read/written from/to is incorrect.
• Codes for the command/response type of
a subheader are not within the
specifications.
• MC protocol communications: 00
• Communications using a fixed buffer: 60
• Communications using a random access
50
buffer: 61 , 62
H
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 specified
51
H
by a connected device has 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 exceeds the range from
52
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.)
• When "ASCII Code" has been selected in
the communication data code setting in
the Ethernet operation setting, ASCII
54
H
code data which cannot be converted into
binary code data has been sent from the
connected device.
• When "Enable Online Change" was
disabled (or not selected) in the Ethernet
operation setting, the connected device
requested a data write while the CPU
55
module was running.
H
• While the CPU module was running, the
connected device requested for writing a
parameter, program, or microcomputer
program.
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
command/response type set
to 3C
H H
for the connected device.
H
(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.
• Check and correct the data
sent from the connected
device.
• Enable (select) "Enable
Online Change" in the
Ethernet operation setting
and write data. (However, a
parameter, program, or
microcomputer program
cannot be written while the
CPU module is running.)
• Set the switch on the CPU
module to STOP and write
the data.
CHAPTER 16 TROUBLESHOOTING
: 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
16
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