Mitsubishi Electric MELSEC iQ-R Series User Manual page 480

Error code Error
(hexadecima
l)
7D17H Packet size error
7D18H Insufficient digit
number error
7D19H Abnormal digit
number error
7D1AH Data length error
7D1BH Value range error
7D20H Data length size
error
Data count size
error
27 TROUBLESHOOTING
478
27.4 Error Code List
Description Signal
name
• A packet of more than CHn
2048 bytes was received. ERR.
• When data is received CHn
using a protocol including ERR.
a packet that contains
Conversion variable
(Variable number of data),
the data (the number of
digits) corresponding to
the Conversion Variable is
insufficient.
• When data is received CHn
using a protocol including ERR.
a packet that contains
Conversion Variable
(Fixed 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 CHn
the target device, the ERR.
Length value does not
match the data length of
the Conversion
Variable(s).
• When data is received CHn
using a protocol including ERR.
a packet that contains
Conversion Variable, data
for the Conversion
Variable exceeds the
range of value allowed for
C24.
• The value set in the data CHn
length storage area or the ERR.
data count storage area is
out of range.
Corrective action
• Check the data length of the
packet sent from the target
device.
• Divide the packet data into
several parts and send them
separately.
• Review data sent from the
target device.
• Check the packet format of
the target device to see if the
number of digits is set
correctly.
• Review data sent from the
target device.
• Check the packet format of
the target device to see if the
number of digits is set
correctly.
• Check the packet format of
the target device to see if the
conversion variable is set
correctly.
■Check the data sent from the
target device to see if;
• The Length value is incorrect.
• Any of the data corresponding
to the conversion variable is
missing.
• Review data sent from the
target device.
■Check the packet format of the
target device to see if the
conversion size is set incorrectly.
• If it exceeds the range for
word data, change the
conversion size setting to
double word.
• If it exceeds the range for
double word data, change the
element to Non-conversion
Variable.
• Check the maximum data
length can be set to the data
length storage area, and
specify the value which is
equal to the maximum data
length or less.
• Check the maximum number
of data can be set to the data
count storage area, and
specify the value which is
equal to the maximum number
of data or less.
Protocol
MC Nonpr Bidire Prede
ocedu ctiona fined
ral l
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