Mitsubishi QJ71DN91 User Manual page 132

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