Error Code List - Mitsubishi MELSEC-Q Series User Manual

9 TROUBLE SHOOTING

9.3 Error Code List

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The error code list is indicated on subsequent pages.
[Error type]
The errors are divided into the following three types.
(1) Module stop error (Displayed as "Stop" in the table)
(a) The ERR. LED flickers.
(b) When a module stop error occurs, the following functions of the Web server
module will stop.
1) Monitoring function
2) Tag function
3) Logging function
4) Event monitor function
5) Dedicated instruction
According to the error code, take corrective action for the error, and power
the PLC off and then on or reset the CPU module.
(c) The error code is stored into the buffer memory area corresponding to the
erroneous part. Refer to Section 9.2 About error code.
(2) Module continue error (Displayed as "Continue" in the table)
(a) The ERR. LED turns on.
(b) When a module continue error occurs, the functions of the Web server
module will be maintained.
Taking corrective action according to the error code will rectify the
operation.
However, since the ERR. LED remains on, turn it off by Error clear request
(Y10).
(c) The error code is stored into the buffer memory area corresponding to the
erroneous part. Refer to Section 9.2 About error code.
(3) Browser display/Dedicated instruction error (Displayed as "Display"
in the table)
(a) The ERR. LED does not turn on/flicker (does not change).
(b) When a browser display/dedicated instruction error occurs, the functions of
the Web server module will be maintained.
(c) When a browser display/dedicated instruction error occurs, no error code is
stored into the buffer memory.
1) When a browser display/dedicated instruction error occurs due to the
Web browser operation
The error code is displayed on the Web browser. (Displayed on the
applet display screen, etc.)
2) When a browser display/dedicated instruction error occurs due to the
dedicated instruction
The error code is stored into Completion status.
MELSEC-Q
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