# Deadband will not go 0

**URL:** <https://forum.inductiveautomation.com/t/deadband-will-not-go-0/42043>\
**Category:** Ignition\
**Tags:** ignition80\
**Created:** [January 7, 2021, 8:35pm UTC](https://forum.inductiveautomation.com/t/deadband-will-not-go-0/42043 "2021-01-07T20:35:41Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![tcurtis](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/tcurtis/32/8653_2.png) [@tcurtis](https://forum.inductiveautomation.com/u/tcurtis)\
**Post date:** [January 7, 2021, 8:35pm UTC](https://forum.inductiveautomation.com/t/deadband-will-not-go-0/42043/1 "2021-01-07T20:35:42Z")

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Wondering if anyone can suggest a way to help. We have an RPM value being registered. Only issue is that it “bounces” +/-4 (ish). So we set the deadband to 5. The only issues is when the machine goes to shutdown if the downward values come down and hit 3 or lower when read then the deadband prevents up from getting a 0 value there when the motor is stopped. Any suggestions?

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**Author:** ![robb](https://avatars.discourse-cdn.com/v4/letter/r/a183cd/32.png) [@robb](https://forum.inductiveautomation.com/u/robb)\
**Post date:** [January 7, 2021, 8:41pm UTC](https://forum.inductiveautomation.com/t/deadband-will-not-go-0/42043/2 "2021-01-07T20:41:28Z")

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Hi,

If the RPM are a floating value in the PLC, can you add logic so that if the RPM is less than 5, move a 0 to the float?

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**Author:** ![kcollins](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kcollins/32/19646_2.png) [@kcollins](https://forum.inductiveautomation.com/u/kcollins)\
**Post date:** [January 7, 2021, 8:58pm UTC](https://forum.inductiveautomation.com/t/deadband-will-not-go-0/42043/3 "2021-01-07T20:58:31Z")

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If you must do it in the HMI (I prefer @robb’s solution if possible), you can move aside your current `RPM` tag that is bringing in the value (with the deadband) to `RPM_Signal` and then create an expression tag `RPM` with something like:

`if({[~]RPM_Signal}<5,0,{[~]RPM_Signal})`

Then the new `RPM` tag will show `0` for values below 5 (i.e. when `RPM_Signal` is “stuck” at 3).