7 APPLICATION INSTRUCTIONS
7.10 Debugging and Failure Diagnosis Instructions
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• In any of the following cases, an operation error occurs, the error flag (SM0) turns on, and an error code is stored in SD0.
Error
code
Error details Q00J/
Q00/
Q01
QnH QnPH QnPRH QnU LCPU
4230 The CHKEND instruction is not executed after the CHKCIR instruction.
The CHKEND instruction is executed when no CHKCIR instruction has been
executed.
4235 The CHKCIR or CHKEND instruction appears three or more times in all
program files.
The CHKCIR or CHKEND instruction appears two or more times in a single
program file.
The CHKST and CHK instruction are used in a low speed execution type
program.
There are 10 or more F devices in a ladder pattern.
The ladder pattern has 257 or more steps.
The device has been encountered which cannot be used in a ladder pattern.
Index modification has been conducted on the ladder pattern device.
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