When Unit Verify Err. Occurs - Mitsubishi MELSEC-Q Series User Manual

18
TROUBLESHOOTING

18.2.5 When UNIT VERIFY ERR. occurs

The following flowchart shows procedure to be taken when an I/O module verification error
(error code: 2000, UNIT VERIFY ERR.) has occurred at the time of power-on or during
operation of the C Controller system.
UNIT VERIFY ERR. occured
Check the error information on the
<<Module information>> or <<Event
history>> tab of the C Controller setting
utility.
Was the module on
the relevant slot removed and
remounted during
operation?
Yes
Is the module
of the slot mounted
properly?
Yes
Are all the
extension cables of
the base unit connected
properly?
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.
No
No
Mount the module properly.
Has the ERR.
No
LED turned off?
No
Connect the extension cable properly.
Has the ERR.
No
LED turned off?
No
No
No
Figure 18.4 When UNIT VERIFY ERR. has occurred
18.2.5 When UNIT VERIFY ERR. occurs
Reset the C Controller module.
Has the ERR.
LED turned off?
No
Replace the relevant module.
Yes
Yes
END
18.2 Troubleshooting
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Yes
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