# Plc update tag late **URL:** \ **Category:** Ignition\ **Tags:** perspective\ **Created:** [December 17, 2025, 2:47pm UTC](https://forum.inductiveautomation.com/t/plc-update-tag-late/112868 "2025-12-17T14:47:18Z")\ **Posts on this page:** 1\ **Showing post:** 4
**Author:** ![Matrix\_Engineering](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/matrix_engineering/32/19781_2.png) [@Matrix\_Engineering](https://forum.inductiveautomation.com/u/Matrix_Engineering)\ **Post date:** [December 17, 2025, 3:24pm UTC](https://forum.inductiveautomation.com/t/plc-update-tag-late/112868/4 "2025-12-17T15:24:47Z")
> Blocking tag writes are safe in tag event scripts only for memory tags. Any other kind of tag will delay for confirmation of the write. > [@Best practices and pitfalls with Tag Event Scrips](https://forum.inductiveautomation.com/t/best-practices-and-pitfalls-with-tag-event-scrips/99355): > > In summary, my question is: What is best practices, and what to avoid when writing Tag Event Scripts? Background and more details regarding question: From what I have read, the Tag Event Scripts are running in fixed size thread pool (default 3 threads). This would mean that if you have multiple Tag Event Scripts that does slow/blocking operations, it could block any other tag event scripts from running. This would presumably mean that running e.g. network calls like OPC calls, or other poten… --- _[View the full topic](https://forum.inductiveautomation.com/t/plc-update-tag-late/112868)._