Error Code List - Mitsubishi Melsec-L Series User Manual

15.2.2 Error code list

Error code
Error
(Hexa-
decimal)
4000
H
Error detected by
to
CPU module
4FFF
H
7101
H
System error
7102
H
Programmable
7103 controller access
H
error
7104
H
to System error
7116
H
7140 Request data error
H
7141 System error
H
7142 Device name error
H
7143 Device No. error
H
15 - 19
The following shows the error codes, error contents, and corrective actions for errors
that are generated during data communication.
(" " in the table is the error code when the target CPU module is not a Q/L/QnACPU.)
The signal name in the following table indicates the CH
communication error status that is stored into buffer memory address 201
an error occurs.
The CH side LED on status and communication error status can be confirmed by
System monitor and Intelligent function module monitor function of GX Works2. (Refer
to Section 15.1.1.)
For errors without a corresponding signal name entered to errors generated with the
MC protocol communication, "NAK" comes on.
Description
⎯
• The OS of the C24 detected some
error.
• Cannot communicate with the CPU
module.
• The OS of the C24 detected some
error.
• The request exceeded the limit of
processing points that are
predetermined for each command and
allowed for one transmission.
• A word device was designated in a bit
units command.
• The requested range exceeded the last
device number.
CPU module's last device No.
Head device No. + Number of
device points (in message sent
from external device)
• The OS of the C24 detected some
error.
• A device that cannot be designated by
the given command was designated.
• The head device No. is out of range.
Signal
Corrective action
name
• Take corrective actions, referring to the
troubleshooting section of the User's
Manual (Hardware Design,
Maintenance and Inspection) for the
CPU module used.
⎯ • If this error occurs during CPRTCL
instruction execution, identify the CPU
module error, and correct the CPU
device No. that is specified in the Non-
conversion or Conversion variable data
storage area.
⎯
( 1)
• Increase the Response monitoring time
(timer 1).
• Perform a Self-loopback test, and check
C/N
if the data communication with the CPU
module can be performed.
⎯
( 1)
• Check and correct the external device
transmit message and restart data
communications.
• If no error is found in the device range,
PRO.
clear the programmable controller CPU
information and retry. (Refer to Section
15.5.)
⎯
( 1)
• Check and correct the external device
transmit message and restart data
communications.
• If no error is found in the device name,
PRO.
clear the programmable controller CPU
information and retry. (Refer to Section
15.5.)
• Check and correct the external device
PRO. transmit message and restart data
communications.
15 TROUBLESHOOTING
side LED on status or
/202
H H
Protocol
Non- Bi-
MC proce- direc-
dural tional
15 - 19
when
Pre-
defined