Mitsubishi QJ71C24N User Manual page 338

11 TROUBLESHOOTING
Error code
Error
(Hexa-
decimal)
Invalid number of
7D19
H
digits error
7D1A Data length error
H
7D1B Value range error
H
Data length setting
7D20 error, data quantity
H
setting error
Decimal point
7D21
H
position error
7E00
H
to System error
7E05
H
Buffer memory
7E06
H
address setting error
7E07 System error
H
Currently
7E08
H
inexecutable error
7E09
H
System error
7E0A
H
7E40 Command error
H
7E41 Data length error
H
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Description
• When data are received by the protocol
including a packet that contains a
conversion variable (variable number of
data and variable number of digits), the
corresponding data is 0 bytes (0 digits)
or exceeds the maximum number of
digits.
• In the data received from the external
device, the Length value does not
match the data length of the conversion
variable(s).
• When the protocol used for data
reception includes a packet that
contains a conversion variable, a value
of the data for the conversion variable
exceeds the range allowed for the Q
series C24N.
• The value set in the data length storage
area or the data quantity storage area is
out of range.
• An out-of-range value is set for the
decimal point position when the number
of decimals is set to Variable.
• The number of decimals is larger than
the number of digits for each data.
• The OS of the Q series C24 detected
some error.
• Transmit/receive buffer memory
addresses are in the special
applications area.
• The OS of the Q series C24 detected
some error.
• The UINI instruction was executed
during programmable controller CPU
information clear.
• The OS of the Q series C24 detected
some error.
• A nonexistent command or
subcommand was designated.
• A data length exceeding the number of
points that can communicate during
random read/write was designated.
Signal
Corrective action
name
• Correct the data sent from the device.
• If the protocol was edited in GX
CHn Configurator-SC (Pre-defined protocol
ERR. support function), check the packet
format of the external device to see if
the number of digits is set correctly.
• Check the data sent from the external
device to see if:
(1) The Length value is correct or not.
(2) Any of the data corresponding to the
conversion variable is missing or
CHn
not.
ERR.
• If GX Configurator-SC (Pre-defined
protocol support function) was used for
protocol editing, check the sender's
packet format to see if an incorrect
value is set for the conversion variable.
• Check the data sent from the external
device.
• If GX Configurator-SC (Pre-defined
protocol support function) was used for
protocol editing, check the sender's
packet format to see if an incorrect
CHn
value is set for the conversion size.
ERR.
(1) If it exceeds the range for word data,
change the conversion size setting to
Double word.
(2) If it exceeds the range for double-word
data, change the element to Non-
conversion variable.
• Check the maximum allowable data
length, and specify the maximum length
or less in the data length storage area.
CHn
• Check the maximum allowable data
ERR.
quantity, and specify the maximum
quantity or less in the data quantity
storage area.
• Correct the value set for the decimal
point position.
• Check the number of digits setting, and
CHn
ERR. set the decimal point position so that
the number of decimals is less than the
number of digits.
⎯
( 1)
• Change the buffer memory addresses so
⎯
that they are outside the special
applications area.
⎯
( 1)
• Execute the UINI instruction while the
⎯
programmable controller CPU
information clear is not executed.
⎯
( 1)
• Check and correct the external device
PRO transmit message and restart data
communications.
• Check and correct the external device
PRO transmit message and restart data
communications.
MELSEC-Q
Protocol
Non
Bidire- Pre-
MC Proce-
ctional defined
dure
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