When Control-Bus.err. Occurs - Mitsubishi MELSEC-Q Series User Manual

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TROUBLESHOOTING

18.2.6 When CONTROL-BUS.ERR. occurs

The following flowchart shows procedures to be taken when a control bus error (error
code: 1412 to 1416, CONTROL-BUS. ERR.) has occurred at the time of power-on or
during operation of the C Controller system.
Note that this flowchart applies only when the relevant slot or base unit can be identified by
the error code
.
CONTROL-BUS.ERR. occured
Confirm the error information on the
<<Module information>> or <<Event
history>> tab of the C Controller
setting utility.
Reset the C Controller module and
RUN it again.
Is the ERR. LED
turned off?
Is the module in
the relevant slot mounted
properly? Is the extension cable of the
base unit connected
properly?
Yes
Are all the
extension cables of the base
unit connected properly?
Yes
Is There noise?
Yes
Replace the module.
Has any error occurred?
Yes
Replace the C Controller module.
Has any error occurred?
Yes
Replace the base unit.
Has any error occurred?
Yes
It is a hardware fault of the module.
Please consult your local Mitsubishi service
center or representative, explaining the
details of the problem.
Figure 18.5 When CONTROL-BUS. ERR. has occurred
Yes
Mount the module and connect
No
the extension cable properly.
No
Is the ERR. LED
turned off?
No
Connect the extension cable properly.
No
Has the ERR. LED
turned off?
No
Take measures against noise.
No
No
No
18.2 Troubleshooting
18.2.6 When CONTROL-BUS.ERR. occurs
Yes
Yes
END
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