Mitsubishi MELSEC Q Series Programming Manual page 985

Error
Code Error Contents and Cause
(SD0)
[CAN'T EXECUTE(P)]
More than 16 nesting levels are programmed.
■Collateral information
• Common information: Program error location
4213
• Individual information:-
■Diagnostic Timing
• When instruction executed
[CAN'T EXECUTE(I)]
Though an interrupt input occurred, the
corresponding interrupt pointer does not exist.
■Collateral information
4220
• Common information: Program error location
• Individual information:-
■Diagnostic Timing
• When instruction executed
[CAN'T EXECUTE(I)]
An IRET instruction does not exist in the executed
interrupt program.
■Collateral information
4221
• Common information: Program error location
• Individual information:-
■Diagnostic Timing
• When instruction executed
[CAN'T EXECUTE(I)]
The IRET instruction exists before the FEND
instruction of the main routine program.
■Collateral information
• Common information: Program error location
• Individual information:-
■Diagnostic Timing
• When instruction executed
[CAN'T EXECUTE(I)]
4223
• The IRET instruction was executed in the fixed
scan execution type program.
• The STOP instruction was executed in the fixed
scan execution type program.
■Collateral information
• Common information: Program error location
• Individual information:-
■Diagnostic Timing
• When instruction executed
[CAN'T EXECUTE(I)]
The interrupt pointer for the module mounted on
the extension base unit is set in the redundant
system.
4225 ■Collateral information
• Common information:-
• Individual information:-
■Diagnostic Timing
• At power-on/At reset
[INST. FORMAT ERR.]
The number of CHK and CHKEND instructions is
not equal.
■Collateral information
4230
• Common information: Program error location
• Individual information:-
■Diagnostic Timing
• When instruction executed
Corrective Action
Keep nesting levels at 16 or under.
Read common information of the error using the
programming tool to identify the numeric value
(program error location). Check the error step
corresponding to the value, and correct it as
necessary.
Read common information of the error using the
programming tool to identify the numeric value
(program error location). Check the error step
corresponding to the value, and correct it as
necessary.
Delete the setting of interrupt pointer for the
module mounted on the extension base unit,
since it cannot be used.
Read common information of the error using the
programming tool to identify the numeric value
(program error location). Check the error step
corresponding to the value, and correct it as
necessary.
LED Status Corresponding
CPU Status CPU
RUN:
Off
ERR.:
QCPU
Flicker
LCPU
CPU Status:
Stop
QCPU
LCPU
RUN:
Off
ERR.:
Flicker
CPU Status:
Stop
*12
QnPRH
Qn(H)
QnPH
12-65
1
2
3
12
6
6
7
8