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MELSEC-Q
9 TROUBLESHOOTING
Error
code
(Dec.)
Error
detection
Description Corrective action
19 Slave node
Sufficient data to execute the specified operation was not
provided.
• Check that the specified MAC ID, class ID, instance ID and
attribute ID are correct.
• In case of attribute write, verify that the specified data is
sufficient and the data length is correct.
• Referring to the slave node manual, check the condition under
which the slave node notifies this error, and take an appropriate
action.
20 Slave node The specified attribute is not supported.
• Check that the specified MAC ID, class ID, instance ID and
attribute ID are correct.
• Referring to the slave node manual, check the condition under
which the slave node notifies this error, and take an appropriate
action.
21 Slave node The service provided excessive data.
• Set the data to be returned by the slave node to 240 bytes or
less.
22 Slave node The specified object does not exist in a slave node.
• Check that the specified MAC ID, class ID, instance ID and
attribute ID are correct.
• Referring to the slave node manual, check the condition under
which the slave node notifies this error, and take an appropriate
action.
50 QJ71DN91 The response data format is invalid.
• Check the entire network and slave node statuses such as
whether or not a terminal resistor is disconnected.
55 QJ71DN91 The specified slave node number is other than 0 to 63. • Specify a slave node number between 0 and 63.
57 QJ71DN91 The sequence of the division reception is invalid.
• Check the entire network and slave node statuses such as
whether or not a terminal resistor is disconnected.
257 QJ71DN91 The data length set in the buffer memory is 241 or more. • Set the data length to 240 bytes or less.
258 QJ71DN91
An invalid value was set as a command number in the message
communication command area of the buffer memory.
• Set a command number to either
0001
H
, 0101
H
, 0102
H
, 0201
H
or FE
∗∗
H
.
300 QJ71DN91 The local node is offline. • Turn ON Y11 to set the local node online.
301 QJ71DN91 An error occurred during data queuing.
• Execute a hardware test to verify whether or not hardware is
normal.
302 QJ71DN91 A timeout occurred while waiting for a response.
• Check the entire network and slave node statuses such as
whether or not a terminal resistor is disconnected.
303 QJ71DN91 An invalid response was obtained.
• Check the entire network and slave node statuses such as
whether or not a terminal resistor is disconnected.
304 QJ71DN91 A node number being used for a reserved node was specified. • Set a node number that is not being used for a reserved node.
305 QJ71DN91 A message was sent to the local node. • Specify a node other than the local node to send messages.
306 QJ71DN91 Opening of the message connection failed.
• Check whether the parameter message group has been set
correctly or not.
317 Slave node The response data length is too long.
• Verify that the transmission message can be responded by a
slave node.