Troubleshooting - Mitsubishi MELSEC-Q Series User Manual

18

TROUBLESHOOTING

18.2 Troubleshooting
If a fault has occurred in the C Controller module, first conduct a hardware self-diagnostics
to check the C Controller module for a hardware failure. (
If a problem arises, see the following table and refer to the relevant troubleshooting flow to
identify the cause.
18
- 2 18.2 Troubleshooting
No.
1 When the POWER LED of the power supply module turns off
2 When the MODE LED of the C Controller module is not lit green
When the ERR. LED turns on or flashes although the C Controller
3
module has started normally
4 When the RUN LED of the C Controller module keeps flashing
5 When UNIT VERIFY ERR. occurred
6 When CONTROL-BUS. ERR. occurred
When communications are not available between the development
7
environment (personal computer) and C Controller module
8 When the program cannot be written to the C Controller module
When an error occurs in user program execution although the C
9 Controller module operates normally with the ERR. LED not lit or
flashing
When a file system error occurs in the standard ROM or
10
CompactFlash card
11 When the output module's LED does not turn on
12 When the output load device of the output module does not turn on
When the C Controller module does not operate normally due to
13
script file execution
14
When the SW PVC-CCPU can not be uninstalled correctly
When the C Controller module became faulty and the factory-set
15
conditions need to be restored.
When an error occurred while downloading user program or
16
executing it with Id command.
Table18.1 Troubleshooting list
Description
Section 18.5)
Reference
section
Section 18.2.1
Section 18.2.2
Section 18.2.3
Section 18.2.4
Section 18.2.5
Section 18.2.6
Section 18.2.7
Section 18.2.8
Section 18.2.9
Section 18.2.10
Section 18.2.11
Section 18.2.12
Section 18.2.13
Section 8.4
Section 5.10
Section 18.2.14