A Compatible 1C Frame Communications Error Code Table - Mitsubishi Electric 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
11 - 30
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
11 - 30