Mitsubishi MELSEC L Series User Manual page 152

Error
Error Contents and Cause
Code
[NO END COVER]
No END cover.
■Collateral information
• Common information: Module No. (Block No.)
2030
• Individual information:-
■Diagnostic Timing
• At power-on/At reset
[NO END COVER]
No END cover.
■Collateral information
2031 • Common information: Module No. (Block No.)
• Individual information:-
■Diagnostic Timing
• When an END instruction executed
[UNIT BAD CONNECT]
• The I/O module status is different from that
obtained at power-on.
• The I/O module (including the intelligent function
module) is nearly disconnected or is completely
disconnected during running.
• An extension cable is not securely connected.
• Runaway or failure of the CPU module (built-in
2040
I/O, built-in CC-Link)
•Malfunction due to noise or other causes
•Hardware failure
■Collateral information
• Common information: Module No. (Slot No.)
• Individual information:-
■Diagnostic Timing
• Always
[EXT. CABLE ERR.]
An extension cable is disconnected.
■Collateral information
• Common information: Module No. (Block No.)
2050
• Individual information: -
■Diagnostic Timing
• When an END instruction executed
[SP. UNIT LAY ERR.]
The slot where the QI60 is mounted was assigned
as other than an intelligent function module or
interrupt module in the I/O assignment tab of the
PLC parameter dialog box.
2100
■Collateral information
• Common information: Module No. (Slot No.)
• Individual information:-
■Diagnostic Timing
• At power-on/At reset
150
Corrective Action
• Attach an END cover.
• Check that the modules are properly connected
with referring to the System Monitor dialog box.
• Reset the CPU module and run it again. If the
same error code is displayed again, the cause
is a hardware failure of the CPU module, I/O
module, intelligent function module, END cover,
branch module, or extension module. (Please
consult your local Mitsubishi representative,
explaining a detailed description of the
problem.)
• Read common information of the error using
the programming tool to identify the numeric
value (module No.). Check the module
corresponding to the value and replace it as
necessary.
• Monitor SD1400 to SD1431 using the
programming tool to identify the module of
which data bit is "1". Check the module and
replace it as necessary.
• Securely connect the connector part of an
extension cable to the module. (Insert the
connector until it clicks.)
• Take noise reduction measures.
• Reset the CPU module and run it again. If the
same error code is displayed again, the cause
is a hardware failure of the CPU module, I/O
module, intelligent function module, END cover,
branch module, or extension module. (Please
consult your local Mitsubishi representative,
explaining a detailed description of the
problem.)
• Connect the extension cable.
• Reset the CPU module and run it again. If the
same error code is displayed again, the cause
is a hardware failure of the CPU module, I/O
module, intelligent function module, END cover,
branch module, or extension module. (Please
consult your local Mitsubishi representative,
explaining a detailed description of the
problem.)
Make setting again to match the PLC parameter
I/O assignment with the actual loading status.
LED Status, Corresponding
CPU Status CPU
LCPU
RUN:
Off
ERR.:
Flicker
CPU Status:
Stop
*28
LCPU
*8
Qn(H)
QnPH
QnPRH