Mitsubishi Electronics QJ71DN91 ユーザーズマニュアル
9 - 8 9 - 8
MELSEC-Q
9 TROUBLESHOOTING
(3) when the error-detected node number (lower byte of error information) is other
than FF
H
and FE
H
Detection time period
Error
code
code
(HEX.)
Error detection
Description
Corrective action
Master
function
Slave
function
01
H
QJ71DN91
A network problem was detected after
communication was started.
communication was started.
• Check that the cable is connected correctly.
1E
H
QJ71DN91
Slave node did not respond.
• Check the entire network and slave node
statuses such as whether or not the MAC ID
and baud rate are set correctly, a slave node is
down, or a terminal resistor is disconnected.
and baud rate are set correctly, a slave node is
down, or a terminal resistor is disconnected.
20
H
Slave node
Slave node responded with a non-prescribed
error.
error.
• Read the communication error information, and
take an appropriate action according to the
error information.
error information.
23
H
Slave node
Slave node responded with an error when
establishing a connection.
establishing a connection.
• Read the communication error information, and
take an appropriate action according to the
error information.
error information.
24
H
QJ71DN91
The input data size of a parameter is different
from the size of the actual slave node.
from the size of the actual slave node.
• Check the slave node manual and set the
correct input data size.
25
H
QJ71DN91
The output data size of a parameter is different
from the size of the actual slave node.
from the size of the actual slave node.
• Check the slave node manual and set the
correct output data size.
26
H
QJ71DN91
Response data of a function that is not supported
by the QJ71DN91 was received.
by the QJ71DN91 was received.
• Check the slave node manual, and change the
setting so that any data of functions not
supported by the QJ71DN91 will not be sent by
the slave node.
supported by the QJ71DN91 will not be sent by
the slave node.
• Check the entire network and slave node
statuses such as whether or not a terminal
resistor is disconnected.
resistor is disconnected.
27
H
Slave node
The connection is set to the mode that was
already specified.
already specified.
• Check the entire network and slave node
statuses such as whether or not a terminal
resistor is disconnected.
resistor is disconnected.
28
H
QJ71DN91
Unexpected invalid data was received when
establishing a connection.
establishing a connection.
• Check the entire network and slave node
statuses such as whether or not a terminal
resistor is disconnected.
resistor is disconnected.
29
H
Slave node
Connection has already been established with
that slave node.
that slave node.
• Wait a while, and reset the slave node if the
connection cannot be established.
2A
H
QJ71DN91
The data length of a polling response is different
from the data length read from the slave node
when establishing a connection.
from the data length read from the slave node
when establishing a connection.
• Check the entire network and slave node
statuses such as whether or not a terminal
resistor is disconnected.
resistor is disconnected.
2B
H
QJ71DN91
The first division data was received twice in the
division reception of a polling response.
division reception of a polling response.
• Check the entire network and slave node
statuses such as whether or not a terminal
resistor is disconnected.
resistor is disconnected.
2C
H
QJ71DN91
The received division data number is different
from the expected number in the division
reception of a polling response.
from the expected number in the division
reception of a polling response.
• Check the entire network and slave node
statuses such as whether or not a terminal
resistor is disconnected.
resistor is disconnected.
2D
H
QJ71DN91
Intermediate data or last data was received
before receiving the first division data in the
division reception of a polling response.
before receiving the first division data in the
division reception of a polling response.
• Check the entire network and slave node
statuses such as whether or not a terminal
resistor is disconnected.
resistor is disconnected.
3B
H
QJ71DN91
Two or more identical node numbers (MAC IDs)
were detected in parameters.
were detected in parameters.
• Two or more slave nodes having the same
node number are set in the parameters. Set the
correct node numbers.
correct node numbers.
• A slave node having the same node number as
that of the local node exists in the parameters.
47
H
QJ71DN91
Incorrect connection type was specified.
• Check that the connection type value is correct.
• Read the communication error information, and
• Read the communication error information, and
take an appropriate action according to the
error information.
error information.
80
H
QJ71DN91
Timeout occurred during the polling connection of
the slave function.
the slave function.
• Check the entire network and slave node
statuses such as whether or not a terminal
resistor is disconnected.
resistor is disconnected.
• Check the master node status.
81
H
QJ71DN91
A connection other than explicit messages and
polling was allocated.
polling was allocated.
• Do not allocate I/O connections other than
polling.
82
H
QJ71DN91
The number of reception bytes of polling is
greater than the maximum number of reception
points.
greater than the maximum number of reception
points.
• Match the I/O point setting of the master node
with that of the QJ71DN91.