GE PACSystems RXi User Manual

Appendix A. CPU Performance DataGFK-2816F August 2015 295A.2 Instruction TimingThe tables in this section list the execution and incremental times in microseconds for eachfunction supported by the RXi CPU.A.2.1 Execution TimesTwo execution times are displayed for each instruction.Execution Time DescriptionEnabled Time in microseconds required to execute the function or function block whenpower flows into the function with valid inputs.Disabled Time in microseconds required to execute the function when it is not enabled.Notes:■ All times represent typical execution time. Times may vary with input and errorconditions.■ Enabled time is for single length units of word-oriented memory.■ DO_IO time was measured using a discrete output module.■ Timers are updated each time they are encountered in the logic by the amount of timeconsumed by the last sweep.A.2.2 RXi Incremental TimesAn Increment time is displayed for functions that can have variable length inputs.Incremental time is added to the base function time for each addition to the length of an inputparameter. This time applies only to functions that can have varying input lengths (Search,Array Moves, etc.)Units:■ For table functions, increment is in units of length specified.■ For bit operation functions, increment is microseconds per bit.■ For data move functions, microseconds per unit.