A Compatible 1C Frame Communications Error Code Table - Mitsubishi QJ71C24N User Manual

11 TROUBLESHOOTING

11.2.2 A compatible 1C frame communications error code table

Error code
Error
(Hexa-
decimal)
00 Disable during RUN
H
01 Parity error
H
02 Sum check error
H
03 Protocol error
H
04 Framing error
H
05 Overrun error
H
06 Character area error
H
07 Character error
H
Programmable
08 controller access
H
error
10 PC No. error
H
11 Mode error
H
Special function
12 module designation
H
error
Special function
21
H
module bus error
42 Other errors
H
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The following table lists the error code, error contents, and corrective action for errors
generated during A compatible 1C frame communications.
Error Contents
• A write command was designated when
"Disable write during RUN" was set.
• Parameter or sequence program was
written during RUN.
• The data does not match the parity bit
setting.
• The sum check calculated by the Q
series C24 and the transmitted sum
check are not the same.
• Received message that is different from
the control procedure with the
communication protocol setting.
• The data does not match the stop bit
setting.
• The next data was received before the
Q series C24 received all the preceding
data.
• Designation method error in part of a
message.
• A command that does not exist was
designated.
• The number of processing points is
outside the range for the command.
• A device that does not exist was
designated.
• Received data that cannot be used.
• The CPU cannot communicate with the
Q series C24.
• The PC No. is not "FF", or a station No.
set in the network parameters.
• An error was detected upon access to
the programmable controller CPU.
• A special function module does not
exist at the specified position.
• An error was detected upon access to a
special function module at the specified
position.
Signal
Corrective action
name
• Change the setting to "Enable write
during RUN" and restart data
C/N communications.
• Stop the CPU and restart data
communications.
• Match the Q series C24 and external
P/S
device settings.
P/S • Check the external device sum check.
• Check and correct the external device
PRO transmit message and restart data
communications.
• Match the Q series C24 and external
SIO
device settings.
• Decrease the transmission rate and restart
SIO
data communications.
• Check and correct the external device
PRO
transmit message and restart data
transmission.
PRO
• Replace the CPU with a CPU that can
C/N
communicate with the Q series C24.
• Check and correct the external device
C/N transmit message and restart data
communications.
• Send again.
⎯
• Conduct individual station recovery test
and check the Q series C24.
• Check and correct the external device
C/N transmit message and restart data
communications.
• Check the error and take corrective action
C/N according to the manual of the
corresponding module.
See POINT .
MELSEC-Q
Protocol
Non
Bidire- Pre-
MC Proce-
ctional defined
dure
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