Percentage of task execution time: 50%
Countermeasures
1. Measure the execution time of the DB Connection Instruction in reference to B-1-3 How to Measure
Execution Time of DB Connection Instructions. If the execution time of the DB Connection
Instruction exceeds the acceptable range of the equipment, take the following actions.
Execute a dummy DB_Insert instruction once after executing the DB_CreateMapping instruction
as a preparation for starting the actual operation.
Phenomenon 3: When Communications or SD Memory Card Processing was
Executed in the CPU Unit, Execution Time of a DB Connection Instruction Got Longer
Possible causes
The following can be the causes:
1. The sufficient processing time may not be allocated to the DB Connection Service that is executed
as a system service due to execution of communications or SD Memory Card processing.
Countermeasures
1. Reconsider the task design so that the sufficient execution time can be allocated to the system
services in reference to B-1-4 Guideline for System Service Execution Time Ratio.
Phenomenon 4: Execution Time of DB Connection Instructions is Steadily Long
Possible causes
The following can be the causes:
1. The sufficient execution time may not be allocated to the system services.
Countermeasures
1. Reconsider the task design so that the sufficient execution time can be allocated to the system
services in reference to B-1-4 Guideline for System Service Execution Time Ratio.
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