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MELSEC-Q
9 TROUBLESHOOTING
Detection time period
Error
code
(HEX.)
Error detection Description Corrective action
Master
function
Slave
function
07
H
QJ71DN91 No slave node has been set. • Set at least one slave node.
08
H
QJ71DN91
The total input data length of all slave nodes is
too long.
• Reduce the total input data length of all slave
nodes to 512 bytes or less.
09
H
QJ71DN91
The total output data length of all slave nodes is
too long.
• Reduce the total output data length of all slave
nodes to 512 bytes or less.
0A
H
QJ71DN91
The watchdog timeout action value in a
parameter is invalid.
• Set it to one of the following:
0000
H
, 0001
H
, 0002
H
or 0003
H
0B
H
QJ71DN91
The expected packet rate value in the buffer
memory is smaller than the production inhibit time
value.
• Change the value so that
•
the expected packet
rate value is greater than or equal to the
production inhibit time value.
0C
H
QJ71DN91
Flash ROM checksum error (parameter area for
the master function)
• Save the parameters again.
• Do not turn OFF the power or reset while saving
the parameters.
0D
H
QJ71DN91
Flash ROM checksum error (parameter area for
the slave function)
• Save the parameters again.
• Do not turn OFF the power or reset while saving
the parameters.
0E
H
QJ71DN91
Flash ROM checksum error (auto communication
start setting area)
• Save the parameters again.
• Do not turn OFF the power or reset while saving
the parameters.
0F
H
QJ71DN91 Flash ROM all clear error
• Clear all parameters again.
• Do not turn OFF the power or reset while
clearing all parameters.
10
H
QJ71DN91
The number of input points per slave node has
exceeded 256 bytes.
• Correct the number of input points per slave
node to 256 bytes or less.
11
H
QJ71DN91
The number of output points per slave node has
exceeded 256 bytes.
• Correct the number of output points per slave
node to 256 bytes or less.
15
H
QJ71DN91
The production inhibit time value was set to 0 ms
(setting value 1) in cyclic.
• Set the production inhibit time value to a value
other than 0 ms.
16
H
QJ71DN91
Slave nodes that were set by parameters are all
reserved nodes.
• Set the parameters according to the slave
nodes connected to the network.
80
H
QJ71DN91
The number of reception bytes of the slave
function is out of range.
• Set it within the range between 0 and 128
bytes.
81
H
QJ71DN91
The number of transmission bytes of the slave
function is out of range.
• Set it within the range between 0 and 128
bytes.
81
H
QJ71DN91
The numbers of transmission bytes and reception
bytes of the slave function are both set to 0.
• Set either the number of transmission bytes or
the number of reception bytes to a value other
than 0.
A0
H
QJ71DN91
The numbers of I/O points of both the master and
slave functions were set to 0 when both the
master and slave functions were used.
• Set the number of I/O points of the slave node
in a master function parameter.
• Set the number of transmission/reception bytes
in a slave function parameter.
(Be sure to set either the master function or
slave function.)