User`s manual

Error code list Troubleshooting
MELSEC System Q, Hardware 11 – 69
11.3.4 Error code list (4000 to 4999)
Error
code
Error contents and cause Corrective action
LED status
CPU
status
Corre-
sponding
CPU
RUN ERR.
4000
INSTRCT CODE. ERR.
– The program contains an instruction code
that cannot be decoded.
– An unusable instruction is included in the pro-
gram.
 Collateral information

Common Information: Program error location
 Individual Information: —
 Diagnostic Timing
At power ON/At reset/STOP → RUN/
When instruction executed
Read the common information of the error using
GX (IEC) Developer, check error step corre-
sponding to its numerical value (program error
location), and correct the problem.
OFF Flicker Stop )
4001
INSTRCT CODE. ERR.
The program contains a dedicated instruction for
SFC although it is not an SFC program.
 Collateral information

Common Information: Program error location
 Individual Information: —
 Diagnostic Timing
At power ON/At reset/STOP → RUN/
When instruction executed
Read the common information of the error using
GX (IEC) Developer, check error step corre-
sponding to its numerical value (program error
location), and correct the problem.
OFF Flicker Stop Q00J/Q00/Q01
(Function
version is B or
later)
Qn(H)
QnPH
QnPRH
QnU
4002
INSTRCT CODE. ERR.
– The name of dedicated instruction specified
by the program is incorrect.
– The dedicated instruction specified by the
program cannot be executed by the specified
module.
 Collateral information

Common Information: Program error location
 Individual Information: —
 Diagnostic Timing
At power ON/At reset/STOP → RUN/
When instruction executed
Read the common information of the error using
GX (IEC) Developer, check error step corre-
sponding to its numerical value (program error
location), and correct the problem.
OFF Flicker Stop )
4003
INSTRCT CODE. ERR.
The number of devices for the dedicated instruc-
tion specified by the program is incorrect.
 Collateral information

Common Information: Program error location
 Individual Information: —
 Diagnostic Timing
At power ON/At reset/STOP → RUN/
When instruction executed
Read the common information of the error using
GX (IEC) Developer, check error step corre-
sponding to its numerical value (program error
location), and correct the problem.
OFF Flicker Stop )
4004
INSTRCT CODE. ERR.
The device which cannot be used by the dedica-
ted instruction specified by the program is speci-
fied.
 Collateral information

Common Information: Program error location
 Individual Information: —
 Diagnostic Timing
At power ON/At reset/STOP → RUN/
When instruction executed
Read the common information of the error using
GX (IEC) Developer, check error step corre-
sponding to its numerical value (program error
location), and correct the problem.
OFF Flicker Stop )
4010
MISSING END INS.
There is no END (FEND) instruction in the pro-
gram.
 Collateral information

Common Information: Program error location
 Individual Information: —
 Diagnostic Timing
At power ON/At reset/STOP → RUN
Read the common information of the error using
GX (IEC) Developer, check error step corre-
sponding to its numerical value (program error
location), and correct the problem.
OFF Flicker Stop )
Tab. 11-6: Error code list (4000 to 4999) for PLC CPUs of MELSEC System Q