# How things work - sequential function charts **URL:** \ **Category:** Ignition\ **Tags:** ignition80\ **Created:** [July 12, 2022, 10:42am UTC](https://forum.inductiveautomation.com/t/how-things-work-sequential-function-charts/61788 "2022-07-12T10:42:16Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![hewking32](https://avatars.discourse-cdn.com/v4/letter/h/b5ac83/32.png) [@hewking32](https://forum.inductiveautomation.com/u/hewking32)\ **Post date:** [July 12, 2022, 10:42am UTC](https://forum.inductiveautomation.com/t/how-things-work-sequential-function-charts/61788/1 "2022-07-12T10:42:16Z")
Hi All I am trying to deepen my understanding of ignition and the sequential function charts. Could you please help me and share your knowledge/experience? 1 what are unique features that sequential function chart brings? 2 can sequential function chart be compared to the operation of the PLC (of course simplified comparison) ie. we have guaranteed flow of the logic without surprises. 3 if the logic is not complicated can sequential function chart be replaced by using gateway time trigged event? this will trigger the code in timely manner. 4 anything else worth knowing about the sequential function charts?