# Writing to EngUnit and Scaling

**URL:** <https://forum.inductiveautomation.com/t/writing-to-engunit-and-scaling/10310>\
**Category:** Ignition\
**Created:** [August 5, 2015, 8:53pm UTC](https://forum.inductiveautomation.com/t/writing-to-engunit-and-scaling/10310 "2015-08-05T20:53:30Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![denji26](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/denji26/32/5805_2.png) [@denji26](https://forum.inductiveautomation.com/u/denji26)\
**Post date:** [August 5, 2015, 8:53pm UTC](https://forum.inductiveautomation.com/t/writing-to-engunit-and-scaling/10310/1 "2015-08-05T20:53:30Z")

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What I’m seeing is when I try to use system.tag.writeAll to edit the EngUnit, RawLow, RawHigh, ScaledLow, ScaledHigh, and ScaleMode of a tag, everything writes correctly except the EngUnit. Sometimes it doesn’t change at all. Sometimes it changes then immediately changes back. Sometimes it works.

When I write to EngUnit only it works fine.

I’m using 7.7.4. Also tried on 7.7.2 with same behavior.