Mitsubishi QJ71MB91, User Manual

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11
- 37 11.4 Error Codes
11.4.3 Error code list
11
TROUBLESHOOTING
Table11.16 Error code list (Continued)
(Continued on next page)
Error code Error Name Error definition Corrective Action
Occurrence
1) 2) 3) 4) 5)
7394
H
(29588)
Online change error
A write request message was received
with online change disabled.
• Do not issue a write request
message while online change is
disabled.
• Turn ON the online change with the
intelligent function module switch to
enable the online change.
7397
H
(29591)
Non-reception
monitoring timeout
No reception for a 1.5 character time or
1 second or more was detected during
message reception, and the message
was discarded.
• Review the setting of the device from
which the relevant message was
sent.
• Check the relevant device.
• Disconnect an erroneous device if
any.
7398
H
(29592)
Short frame error
The received message size (excluding
the start character in the ASCII mode)
was less than 4 or 8 bytes.
Review the contents of the message
issued by the station that sent the
relevant message.
• Check the relevant device.
• Disconnect an erroneous device if
any.
7399
H
(29593)
Character overrun
error
The received message size (excluding
the start character in the ASCII mode)
exceeded 256 or 512 bytes.
• Review the contents of the message
issued by the station that sent the
relevant message.
Check the relevant device.
• Disconnect an erroneous device if
any.
739A
H
(29594)
ASCII-binary
conversion error An ASCII code that cannot be
converted to binary was received.
739B
H
(29595)
End code error
An illegal character was received after
the end code CR.
739C
H
to
739E
H
(29596 to
29598)
System error
The OS of the QJ71MB91 detected a
fault.
Take the following steps:
• Check that the power supply
module, programmable controller
CPU and QJ71MB91 are correctly
mounted on the base unit.
• Confirm that the system is operated
within the general specifications of
the programmable controller CPU.
• Check if the power capacity is
sufficient.
• It can be a hardware error.
Check if the programmable controller
CPU, base unit and QJ71MB91 are
normal referring to the manual for
each module.
Or, replace a module or a unit to
check the operation.
• If the above does not solve the
problem, please consult your local
Mitsubishi system service center or
representative, explaining a detailed
description of the error occurrence,
the GX Developer project and/or the
error code.