Mitsubishi QJ71LP21 Reference Manual page 331

8 TROUBLESHOOTING
Error
Code Error Contents and Cause
*1
(SD0)
The number of CHK and CHKEND
4230
instructions is not equal.
The number of IX and IXEND
4231
instructions is not equal.
The configuration of the check
conditions for the CHK instruction is
incorrect.
4235
Alternatively, a CHK instruction has
been used in a low speed execution
type program.
The designation of a MELSECNET/
4300 MINI-S3 master module control
instruction was wrong.
The designation of an AD57/AD58
4301
control instruction was wrong.
No SFCP or SFCPEND instruction in
4400
SFC program.
The block number designated by the
4410
SFC program exceeds the range.
Block number designations overlap in
4411
SFC program.
A step number designated in an SFC
4420
program exceeds the range.
*1 : Characters in parentheses ( ) indicate the special register numbers where individual information is being
stored.
*12 : This applies to the CPU module of function version B or later.
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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.
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.
Read 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
QnA
Qn(H)
QnPH
QnA
Qn(H)
QnPH
QnA
QnA
Qn(H)
QnPH
QnPRH
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