Mitsubishi QJ71LP21 Reference Manual page 329

8 TROUBLESHOOTING
Error
Code Error Contents and Cause
*1
(SD0)
No NEXT instruction was executed
following the execution of a FOR
4200 instruction.
Alternatively, there are fewer NEXT
instructions than FOR instructions.
A NEXT instruction was executed
although no FOR instruction has been
4201 executed.
Alternatively, there are more NEXT
instructions than FOR instructions.
More than 16 nesting levels are
4202
programmed.
A BREAK instruction was executed
4203 although no FOR instruction has been
executed prior to that.
The CALL instruction is executed, but
4210 there is no subroutine at the specified
pointer.
There was no RET instruction in the
4211
executed subroutine program.
The RET instruction was before the
4212
FEND instruction in the main program.
More than 16 nesting levels are
4213
programmed.
Though an interrupt input occurred,
4220 the corresponding interrupt pointer
does not exist.
An IRET instruction does not exist in
4221
the executed interrupt program.
An IRET instruction exists before the
4223
FEND instruction of the main program.
*1 : Characters in parentheses ( ) indicate the special register numbers where individual information is being
stored.
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Corrective Action
Read the common information of the
error using the peripheral device,
check error step corresponding to its
numerical value (program error
location), and correct the problem.
Keep nesting levels at 16 or under.
Read the common information of the
error using the peripheral device,
check error step corresponding to its
numerical value (program error
location), and correct the problem.
Keep nesting levels at 16 or under.
Read the common information of the
error using the peripheral device,
check error step corresponding to its
numerical value (program error
location), and correct the problem.
MELSEC-Q
Corresponding
CPU
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