Mitsubishi Electric Q12DCCPU-V - Page 474

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16.2 Troubleshooting
16
TROUBLESHOOTING
16.2 Troubleshooting
If a problem has occurred in the C Controller module, first conduct a hardware self-
diagnostics to check the C Controller module itself for a hardware failure. ( Page 16-
75, Section 16.5)
See the following table and refer to the relevant troubleshooting flowchart.
Remark
For C Controller setting utility, refer to the following.
C Controller Module User's Manual (Utility Operation, Programming)
Table 16.1 Troubleshooting list
No. Problem Reference
1 The POWER LED on the power supply module turned off. Page 16-4, Section 16.2.1
2 The MODE LED on the C Controller module is not lit. Page 16-5, Section 16.2.2
3
The ERR. LED is on or flashing although the C Controller module has
started normally.
Page 16-7, Section 16.2.3
4 The RUN LED on the C Controller module remains flashing. Page 16-8, Section 16.2.4
5 UNIT VERIFY ERR. occurred. Page 16-9, Section 16.2.5
6 CONTROL-BUS.ERR. occurred. Page 16-10, Section 16.2.6
7
No communication is available between the development
environment (personal computer) and C Controller module.
Page 16-12, Section 16.2.7
8
A file such as a program file cannot be written to the C Controller
module.
Page 16-15, Section 16.2.8
9
An error occurs during user program execution although the C
Controller module has started normally and the ERR. LED is not on or
flashing.
Page 16-16, Section 16.2.9
10
A file system error has occurred on the standard RAM, standard
ROM, or CompactFlash card.
Page 16-18, Section 16.2.10
11 The LEDs on an output module do not turn on. Page 16-20, Section 16.2.11
12 An output load device of an output module does not turn on. Page 16-21, Section 16.2.12
13
The C Controller module does not operate normally due to script file
execution.
Page 16-22, Section 16.2.13
14
SW3PVC-CCPU cannot be uninstalled correctly.
C Controller Module User's Manual (Utility Operation,
Programming)
15
C Controller module became faulty and it needs to be reset to the
factory-set conditions.
Page 6-72, Section 6.10
16
An error occurred during user program download or ld command
execution.
Page 16-25, Section 16.2.14
17
Data cannot be read from or written to the device specified with a
MELSEC data link function.
Page 16-27, Section 16.2.15
18
An error occurred during reading from or writing to the standard RAM,
standard ROM, CompactFlash card, or RAM disc with FTP.
Page 16-28, Section 16.2.16
19 Telnet connection cannot be made. Page 16-30, Section 16.2.17
20 FTP connection cannot be made. Page 16-32, Section 16.2.18
Q12DCCPU-V
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Q06CCPU-V-B