# Non continuous Modbus adresses

**URL:** https://discourse.nodered.org/t/non-continuous-modbus-adresses/16188
**Category:** General
**Created:** [2 October 2019 08:52 UTC](https://discourse.nodered.org/t/non-continuous-modbus-adresses/16188 "2019-10-02T08:52:22Z")
**Posts on this page:** 6
**Page:** 1

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### Author: ![jlb](https://avatars.discourse-cdn.com/v4/letter/j/a9adbd/32.png) [@jlb](https://discourse.nodered.org/u/jlb)
#### Post date: [2 October 2019 08:52 UTC](https://discourse.nodered.org/t/non-continuous-modbus-adresses/16188/1 "2019-10-02T08:52:22Z")

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Hello, How can i send a request for non-continuous modbus adresses with the different modbus nodes (reading only) ? For example i want to read the following adresses, in one connection: 1400, 1405, 1412. and not the range 1400 to 1412...

Thanks if you can help !

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### Author: ![ukmoose](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/ukmoose/32/13_2.png) [@ukmoose](https://discourse.nodered.org/u/ukmoose)
#### Post date: [2 October 2019 09:19 UTC](https://discourse.nodered.org/t/non-continuous-modbus-adresses/16188/2 "2019-10-02T09:19:28Z")

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This has come up before, have you tried searching the forum?

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### Author: ![jlb](https://avatars.discourse-cdn.com/v4/letter/j/a9adbd/32.png) [@jlb](https://discourse.nodered.org/u/jlb)
#### Post date: [2 October 2019 09:54 UTC](https://discourse.nodered.org/t/non-continuous-modbus-adresses/16188/3 "2019-10-02T09:54:13Z")

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yep, but i'm gonna make another search maybe i've missed something...

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### Author: ![jlb](https://avatars.discourse-cdn.com/v4/letter/j/a9adbd/32.png) [@jlb](https://discourse.nodered.org/u/jlb)
#### Post date: [2 October 2019 10:13 UTC](https://discourse.nodered.org/t/non-continuous-modbus-adresses/16188/4 "2019-10-02T10:13:04Z")

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I have a look in many, many Q/A and found nothing ...:disappointed\_relieved

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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: [2 October 2019 10:19 UTC](https://discourse.nodered.org/t/non-continuous-modbus-adresses/16188/5 "2019-10-02T10:19:32Z")

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I am 100% not a Modbus person... but I think the answer was that it was often faster / more responsive to just read the whole range and filter at the Node-RED side - than to do multiple reads. But of course that depends on how large the range is / how often you need to read, etc etc.

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### Author: ![jlb](https://avatars.discourse-cdn.com/v4/letter/j/a9adbd/32.png) [@jlb](https://discourse.nodered.org/u/jlb)
#### Post date: [11 October 2019 08:52 UTC](https://discourse.nodered.org/t/non-continuous-modbus-adresses/16188/6 "2019-10-11T08:52:53Z")

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Thx, that's what i will do