Mitsubishi Q2ACPU User Manual page 364

22. TROUBLE SHOOTING
Error
Error Contents and Cause
Code
[OPE. CIRCUIT ERR.]
The DSP operation circuit in the CPU module does
not operate normally.
■Collateral informationmmon
1206
• Common Information:–
• Individual Information:–
■Diagnostic Timing
• When instruction executed
[FUSE BREAK OFF]
There is an output module with a blown fuse.
■Collateral informationmmon
• Common Information:Module No.(Slot No.)
• Individual Information:–
■Diagnostic Timing
• Always
1300
[FUSE BREAK OFF]
• There is an output module with a blown fuse.
• External power supply for output load is turned
off or disconnected.
■Collateral informationmmon
• Common Information:Module No.(Slot No.)
• Individual Information:–
■Diagnostic Timing
• Always
[I/O INT. ERROR]
An interruption has occurred although there is no
interrupt module.
■Collateral informationmmon
1310
• Common Information:–
• Individual Information:–
■Diagnostic Timing
• During interrupt
[SP. UNIT DOWN]
When PLC parameter I/O allocation was being
made, there was no return signal from the special
function module during initial processing
stage.(When error is generated, the head I/O
number of the special function module that
1401
corresponds to the common information is stored.)
■Collateral informationmmon
• Common Information:Module No.(Slot No.)
• Individual Information:–
■Diagnostic Timing
• At power ON/At reset
*1 CPU operation can be set in the parameters at error occurrence. (LED indication varies.)
*2 The BAT.ALM LED turns on at BATTERY ERROR.
This suggests a CPU module hardware fault.
(Contact your local Mitsubishi representative.)
• Check ERR. LED of the output modules and
replace the fuse of the module whose LED is lit.
• Read the common information of the error using the
peripheral device and replace the fuse at the output
module corresponding to the numerical value
(module No.) reading.
Alternatively, monitor special registers SD1300 to
[For Remote I/O network]
SD1331 with the peripheral device and change
Network No./Station No.
the fuse of the output module whose bit has a
value of "1".
• When a GOT is bus-connected to the main base
unit or extension base unit, check the connection
status of the extension cable and the grounding
status of the GOT.
• Check ERR. LED of the output modules and
replace the module whose LED is lit.
• Read the common information of the error using the
peripheral device and replace the fuse at the output
module corresponding to the numerical value
(module No.) reading.
Alternatively, monitor special registers SD1300 to
SD1331 with the peripheral device and change
the fuse of the output module whose bit has a
[For Remote I/O network]
value of "1".
Network No./Station No.
• Check whether the external power supply for
output load is ON or OFF.
• When a GOT is bus-connected to the main base
unit or extension base unit, check the connection
status of the extension cable and the earth status
of the GOT.
Any of the mounted modules is experiencing a
hardware fault. Therefore, check the mounted
modules and change the faulty module. (Contact
your local Mitsubishi representative.)
The CPU module, base unit and/or the special
function module that was accessed is experiencing
a hardware fault. (Contact your local Mitsubishi
representative.)
Corrective Action
22 - 19
LED Status Corresponding
CPU Status CPU
RUN:
Off
ERR.:
Flicker Q4AR
CPU Status:
Stop
QnA
Q4AR
RUN:
Off/On
ERR.:
Flicker/On
CPU Status:
Stop/
*1
Continue
Q2AS
RUN:
Off
ERR.:
Flicker
CPU Status:
Stop
QnA
RUN:
Off
ERR.:
Flicker
CPU Status:
*2
Stop