User`s manual

Error code list Troubleshooting
MELSEC System Q, Hardware 11 – 31
1200
OPE. CIRCUIT ERR.
The operation circuit for index modification in
the CPU module does not operate normally.
 Collateral information

Common Information: —
 Individual Information: —
 Diagnostic Timing
At power ON/ At reset
This suggests a CPU module hardware fault.
Contact your local Mitsubishi representative.
OFF Flicker Stop )
1201
OPE. CIRCUIT ERR.
The hardware (logic) in the CPU module does
not operate normally.
 Collateral information

Common Information: —
 Individual Information: —
 Diagnostic Timing
At power ON/ At reset
1202
OPE. CIRCUIT ERR.
The operation circuit for sequence processing in
the CPU module does not operate normally.
 Collateral information

Common Information: —
 Individual Information: —
 Diagnostic Timing
At power ON/ At reset
1203
OPE. CIRCUIT ERR.
The operation circuit for index modification in
the CPU module does not operate normally.
 Collateral information

Common Information: —
 Individual Information: —
 Diagnostic Timing
When an END instruction executed
This suggests a CPU module hardware fault.
Contact your local Mitsubishi representative.
OFF Flicker Stop QnPRH
1204
OPE. CIRCUIT ERR.
The hardware (logic) in the CPU module does
not operate normally.
 Collateral information

Common Information: —
 Individual Information: —
 Diagnostic Timing
When an END instruction executed
1205
OPE. CIRCUIT ERR.
The operation circuit for sequence processing in
the CPU module does not operate normally.
 Collateral information

Common Information: —
 Individual Information: —
 Diagnostic Timing
When an END instruction executed
1300
FUSE BREAK OFF
There is an output module with a blown fuse.
 Collateral information

Common Information:
Module No.(Slot No.); For Remote I/O net-
work: Network No./Station No.
 Individual Information: —
 Diagnostic Timing
Always
– Check FUSE LED of the output modules and
replace the module whose LED is lit.
(The module with a blown fuse can also be
identified using GX (IEC) Developer. Check the
special registers SD1300 to SD1331 to see if
the bit corresponding to the module is "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 earth status of the GOT.
OFF/ON Flicker/
ON
Stop/
Continue
(CPU oper-
ation can
be set in
the param-
eters at
error
occur-
rence)
Qn(H)
QnPH
QnPRH
QnU
Check ERR. LED of the output modules and
replace the module whose LED is lit.
(The module with a blown fuse can also be iden-
tified using GX (IEC) Developer. Check the spe-
cial registers SD130 to SD137 to see if the bit
corresponding to the module is "1".)
Q00J/Q00/Q01
Error
code
Error contents and cause Corrective action
LED status
CPU
status
Corre-
sponding
CPU
RUN ERR.
Tab. 11-3: Error code list (1000 to 1999) for PLC CPUs of MELSEC System Q