When The "User" Led Turns On - Mitsubishi Electric QS001CPU User Manual

12
TROUBLESHOOTING
Remark
MODULE LAYOUT
ERROR
(Error code: 2125)
CC-LINK PARAMETER
ERROR
(Error code: 3105)
NETWORK PARAMETER
ERROR
(Error code: 3100)
NETWORK PARAMETER
ERROR
(Error code: 3103)

12.2.8 When the "USER" LED turns on

If the "USER" LED turns on, follow the steps described below.
The "USER" LED turns on when an error is detected by the annunciator (F) turns on.
If the "USER" LED turns on, monitor the special relay SM62 and the special registers
SD62 to SD79 in the monitor mode of GX Developer.
Eliminate the error cause after confirming it.
The "USER" LED can be turned off by:
The following causes are possible when the "ERR." LED of the CPU module
flashes at programmable controller power-on.
Table12.2 Error messages and causes
Error Message
The multiple CPU system is
configured.
Modules other than intelligent
function modules are mounted on
the base unit.
The CC-Link Safety master
module mounted on the base unit
is not set as a master station.
• The MELSECNET/H module
mounted on the base unit is not
set as a PLC to PLC network
normal station.
• The number of CC-Link IE Field
Network master/local modules
(with safety functions) actually
mounted is different from that is
set in Network parameter for
CC-Link IE Field Network.
The number of Ethernet modules
actually mounted is different from
that is set in Network parameter
for Ethernet.
• When M62 has turned ON
The annunciator (F) is ON.
Using SD62 to SD79, check the error cause.
• Making a reset with the RUN/STOP/RESET switch.
• Canceling Errors with the special relay and the special register
( Section 12.4)
Cause
Remove all CPU modules other
than the safety CPU module from
the base unit.
Remove all modules other than
intelligent function modules from
the base unit.
Set the CC-Link Safety master
module as a master station.
• Set the MELSECNET/H module
as a PLC to PLC network
normal station.
• Mount or remove the CC-Link
IE Field Network master/local
modules (with safety functions)
so that the number matches
that is set in Network
parameter.
Change either the number of
modules or parameter setting so
that they become the same.
12.2 Troubleshooting Flowchart
12.2.8 When the "USER" LED turns on
Corrective Action
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