| Definition: | for a proportional plus integral element the input and output variable of which are of the same kind, the duration of the time interval required by the step response to reach twice the value that occurred immediately after the step was applied SEE: Figure 17. Note 1 to entry: The reset time is given by 
where
| KI | is the integral action coefficient; |
| KP | is the proportional action coefficient; |
| Ti | is the reset time. |
Note 2 to entry: This entry was numbered 351-28-23 in IEC 60050-351:2006.
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