# RBE node in narrowband

**URL:** <https://discourse.nodered.org/t/rbe-node-in-narrowband/20086>\
**Category:** General\
**Created:** [8 January 2020 23:55 UTC](https://discourse.nodered.org/t/rbe-node-in-narrowband/20086 "2020-01-08T23:55:20Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Andrei](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/andrei/32/10446_2.png) [@Andrei](https://discourse.nodered.org/u/Andrei)\
**Post date:** [8 January 2020 23:55 UTC](https://discourse.nodered.org/t/rbe-node-in-narrowband/20086/1 "2020-01-08T23:55:20Z")

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I wonder how the "start value" field is used by the RBE node in narrowband. I thought it would be used as the last input value but could not make it work that way.

Also I am puzzled why this field exists when the selection is "block if value change is greater than" but does not when the selection is "block if value change is greater or equal to".

![ask-01](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/2X/b/b1e7061616f94c6977c0ef79340c4011a8ae8db7.png)

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**Author:** ![Colin](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/colin/32/17040_2.png) [@Colin](https://discourse.nodered.org/u/Colin)\
**Post date:** [14 January 2020 13:47 UTC](https://discourse.nodered.org/t/rbe-node-in-narrowband/20086/2 "2020-01-14T13:47:47Z")

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I think you are right in that the Start Value should be present in all cases where compared to last in/out value is selected. I suggest raising an issue for that.  
Where it is available it seems to work for me. Can you provide a simple flow showing it not working?

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**Author:** ![dceejay](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/dceejay/32/38_2.png) [@dceejay](https://discourse.nodered.org/u/dceejay)\
**Post date:** [14 January 2020 22:12 UTC](https://discourse.nodered.org/t/rbe-node-in-narrowband/20086/3 "2020-01-14T22:12:30Z")

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Pushed a fix

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**Author:** ![Andrei](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/andrei/32/10446_2.png) [@Andrei](https://discourse.nodered.org/u/Andrei)\
**Post date:** [23 January 2020 18:40 UTC](https://discourse.nodered.org/t/rbe-node-in-narrowband/20086/4 "2020-01-23T18:40:40Z")

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Nice, thanks @dceejay.

Hi @Colin , thanks too. Only today I could test again. I was misinterpreting the results. I confused last valid input x last valid output. All works well.