# When to use system.tag.writeAsync instead of system.tag.writeBlocking?

**URL:** <https://forum.inductiveautomation.com/t/when-to-use-system-tag-writeasync-instead-of-system-tag-writeblocking/102008>\
**Category:** Ignition\
**Tags:** ignition81, scripting\
**Created:** [February 6, 2025, 9:02pm UTC](https://forum.inductiveautomation.com/t/when-to-use-system-tag-writeasync-instead-of-system-tag-writeblocking/102008 "2025-02-06T21:02:30Z")\
**Posts on this page:** 1\
**Showing post:** 10

<div class="post-metadata">

**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\
**Post date:** [February 3, 2026, 4:47pm UTC](https://forum.inductiveautomation.com/t/when-to-use-system-tag-writeasync-instead-of-system-tag-writeblocking/102008/10 "2026-02-03T16:47:54Z")

</div>

You should keep in mind that an overloaded driver for ordinary tag subscriptions will impact write performance. ~~What brand and model of PLC is this? And is this an IA driver or a PLC-supported OPC connection?~~

(Perhaps start a new topic....)

---

_[View the full topic](https://forum.inductiveautomation.com/t/when-to-use-system-tag-writeasync-instead-of-system-tag-writeblocking/102008)._