User`s manual

Troubleshooting Error code list
11 – 52
2501
CAN’T EXE. PRG.
There are multiple program files although "none"
has been set at the PLC parameter program set-
tings.
 Collateral information

Common Information: File name/Drive name
 Individual Information: —
 Diagnostic Timing
At power ON/At reset/STOP → RUN
– Edit the PLC parameter program setting to
"yes".
– Alternatively, delete unneeded programs.
OFF Flicker Stop Qn(H)
QnPH
QnPRH
QnU
CAN’T EXE. PRG.
– There are three or more program files.
– The program name differs from the program
contents.
 Collateral information

Common Information: File name/Drive name
 Individual Information: —
 Diagnostic Timing
At power ON/At reset/STOP → RUN
– Delete unnecessary program files.
– Match the program name with the program
contents.
OFF Flicker Stop Q00J/Q00/Q01
2502
CAN’T EXE. PRG.
– The program file is incorrect.
– Alternatively, the file contents are not those of
a sequence program.
 Collateral information

Common Information: File name/Drive name
 Individual Information: —
 Diagnostic Timing
At power ON/At reset/STOP → RUN
Check whether the program version is ***.QPG,
and check the file contents to be sure they are for
a sequence program.
OFF Flicker Stop )
CAN’T EXE. PRG.
The program file is not the one for the redundant
CPU.
– Alternatively, the file contents are not those of
a sequence program.
 Collateral information

Common Information: File name/Drive name
 Individual Information: —
 Diagnostic Timing
At power ON/At reset/STOP → RUN
Create a program using GX Developer, GX IEC
Developer or PX Developer for which the PLC
type has been set to the redundant CPU
(Q12PRH/Q25PRH), and write it to the CPU
module.
OFF Flicker Stop QnPRH
2503
CAN’T EXE. PRG.
There are no program files at all.
 Collateral information

Common Information: File name/Drive name
 Individual Information: —
 Diagnostic Timing
At power ON/At reset/STOP → RUN
– Check program configuration.
– Check parameters and program configuration.
OFF Flicker Stop )
2504
CAN’T EXE. PRG.
Two or more SFC normal programs or control
programs have been designated.
 Collateral information

Common Information: File name/Drive name
 Individual Information: —
 Diagnostic Timing
At power ON/At reset/STOP → RUN
– Check program configuration.
– Check parameters and program configuration.
OFF Flicker Stop Qn(H)
QnPH
QnPRH
QnU
CAN’T EXE. PRG.
There are two or more SFC programs.
 Collateral information

Common Information: File name/Drive name
 Individual Information: —
 Diagnostic Timing
At power ON/At reset/STOP → RUN
Reduce the SFC programs to one.
OFF Flicker Stop Q00J/Q00/Q01
(Function
version is B or
later)
Error
code
Error contents and cause Corrective action
LED status
CPU
status
Corre-
sponding
CPU
RUN ERR.
Tab. 11-4: Error code list (2000 to 2999) for PLC CPUs of MELSEC System Q