Mitsubishi Electric MELSEC-L SERIES Basic User Manual page 272

Error
Error description
code
• The number of points for a command
specified by a connected device
exceeds the maximum number of
processing points (number of
processes that can be executed per
communication) for each process.
• Addresses from the start address
(start device number and start step
number) to the specified number of
points exceed the largest addresses
(device number and step number) for
each process.
• The byte length of a command is not
within the range defined by the
specifications.
• When data is written, the set number
57
H
of write data points is different from the
specified number of points.
• A monitor request was issued even
though monitoring data is not
registered.
• For data read/write in a microcomputer
program, an address after the last
address that can be set in the
parameter setting has been specified.
• In the block number specification of
the extension file register, a block
number exceeding the range of the
corresponding memory cassette size
has been specified.
• The start address (start device number
and start step number) of a command
specified by a connected device has
been set outside the range that can be
specified.
• For data read/write in a microcomputer
program or file register, values
exceeding the CPU module parameter
setting range has been specified.
• A block number specified for an
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extension file register does not exist.
• A file register cannot be specified.
• A word device has been specified for
the command for bit devices.
• The start number of bit devices has
been specified using a value other
than a multiple of 16 in the command
for word devices.
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Action
MC protocol
communications
• Correct the specified
points or the start
address (device
number and step
number).
• Check the data length
of the command and
set the data again.
• Register the
monitoring data.
• Data cannot be read
from/written to an
area with an address
after the last address.
Correct the specified
address.
• Correct the block
number.
• Correct the value to
the one within the
range that can be
specified for each
process.
• Correct the block
number.
• Correct the device
specification.
• Correct the command
or specified device.
Data communication type
Communications
using a fixed
buffer
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Communications
using a random
access buffer