Appendix B
B-17
B
NJ/NX-series Database Connection CPU Units User’s Manual (W527)
B-2-2 Impact of Operation Log Recording on
Execution Time of DB Connection Instructions
B-2-2 Impact of Operation Log Recording on Execution Time of DB
Connection Instructions
When the Operation Logs are recorded, execution time of DB Connection Instructions (i.e. DB_Insert,
DB_Update, DB_Select, and DB_Delete instructions) gets longer.
The following table gives the reference values for increased execution time of DB Connection
Instructions while the Operation Logs are recorded.
Confirm that the equipment will not be adversely affected before starting recording to the Operation
Logs.
 NX701-20
Log type Instruction Reference value for
increase in instruction
Measurement condition
Execution Log DB_Insert +0.1 ms When executing an INSERT operation for
Debug Log DB_Insert +0.5 ms When executing an INSERT operation for
 NJ501-20
Log type Instruction Reference value for
increase in instruction
Measurement condition
Execution Log DB_Insert +1.4 ms When executing an INSERT operation for
Debug Log DB_Insert +3.3 ms When executing an INSERT operation for
 NJ101-20
Log type Instruction Reference value for
increase in instruction
Measurement condition
Execution Log DB_Insert +2.0 ms When executing an INSERT operation for
Debug Log DB_Insert +7.6 ms When executing an INSERT operation for
Percentage of task execution time: 50%
B-2 Execution Time of DB Connection Instructions
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