Mitsubishi MELSEC QCPU User Manual

2 - 35 2 - 35
MELSEC-Q/QnA
2 INSTRUCTION TABLES
2.5.10 Debugging and failure diagnosis instructions
Table 2.27 Debugging and Failure Diagnosis Instructions
Category
Instruction
Symbols
Symbol Processing Details
Execution
Condition
Number of
Basic Steps
Subset
See for
Description
CHKST
CHKST
• CHK instruction is executed when
CHKST is executable.
• Jumps to the step following the CHK
instruction when CHKST is in a non-
executable status
CHK
Check Condition
CHK
• During normal conditions SM80: OFF,
SD80: 0
• During abnormal conditions
SM80:
ON, SD80: Failure No.
1 7-155
CHKCIR
CHKCIR
• Starts update in ladder pattern being
checked by CHK instruction
Checks
CHKEND
CHKEND
• Ends update in ladder pattern being
checked by CHK instruction
1 7-159
SLT
SLT
• Executes status latch
Status
latch
SLTR
SLTR
• Resets status latch to enable re-
execution
1 7-167
STRA
STRA
• Applies trigger to sampling trace
Sampling
trace
STRAR
STRAR
• Resets sampling trace to enable re-
execution
1 7-169
PTRA
PTRA
• Applies trigger to program trace
PTRAR
PTRAR
• Resets program trace to enable re-
execution
1 7-171
PTRAEXE
PTRAEXE
Program
trace
PTRAEXE
P
PTRAEXEP
• Executes program trace
1 7-171
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com

Mitsubishi MELSEC QCPU Specifications

General

Brand	Mitsubishi
Model	MELSEC QCPU
Category	Controller
Language	English