# Writing Bits in Modbus

**URL:** <https://forum.inductiveautomation.com/t/writing-bits-in-modbus/15227>\
**Category:** Ignition\
**Created:** [September 1, 2017, 12:35pm UTC](https://forum.inductiveautomation.com/t/writing-bits-in-modbus/15227 "2017-09-01T12:35:44Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\
**Post date:** [September 1, 2017, 3:01pm UTC](https://forum.inductiveautomation.com/t/writing-bits-in-modbus/15227/4 "2017-09-01T15:01:07Z")

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Derived tags or scripting functions that do the appropriate masking.

The derived tag approach is discussed here: [Troubles making a Derived Boolean Tag work as a mask for a Short Tag](http://forum.inductiveautomation.com/t/troubles-making-a-derived-boolean-tag-work-as-a-mask-for-a-short-tag/15203/2?u=kevin.herron)

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