Troubleshooting When Using The Melsoft Connection Function - Mitsubishi Electric MELSEC-A Series User Manual

7
TROUBLESHOOTING
7.1 Troubleshooting When Using the MELSOFT Connection
Function
(1) Troubleshooting list
Symptom
RUN LED turned OFF.
Unable to operate programmable
controller CPU from the engineering
tool.
The following is a troubleshooting list of the AJ65BT-R2N.
Table 7.1 Troubleshooting list
Cause
Incorrect switch setting
A watchdog timer error has occurred.
A CC-Link communication error has occurred.
The RS-232 cable is not properly connected
between the AJ65BT-R2N and engineering
tool.
Incorrect switch setting

7.1 Troubleshooting When Using the MELSOFT Connection Function

Action
•Correct the switch setting.
Section 5.4 Part Names and Settings
•Check if all of the RS-232 transmission setting
switches are set to OFF.
•Reapply power to or reset the AJ65BT-R2N.
•If the RUN LED does not turn ON even after that,
check the following.
(1) Check the conditions of the AJ65BT-R2N
installation, terminal block, and wiring.
(2) Check if the system is used in an
environment that satisfies the general
specifications.
(3) Check if power capacity is sufficient
The hardware may be faulty.
(4)
Check if the hardware of the AJ65BT-R2N is
normal, according to this manual.
Section 5.5.1 Hardware test
Or, replace the module and check the
operation.
If the problem persists, the hardware of the
AJ65BT-R2N may be faulty.
Please consult your local Mitsubishi
representative, explaining a detailed description of
the problem.
•Check the indicator LEDs and take corrective
actions.
•Correct the RS-232 cable connection.
•Correct the switch setting.
Section 5.4 Part Names and Settings
•Check if the Mode setting switch is set to 5, and
the RS-232 transmission setting switches are set
to all OFF.
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