# Multidroping on Modbus RTU node

**URL:** <https://discourse.nodered.org/t/multidroping-on-modbus-rtu-node/57618>\
**Category:** General\
**Created:** [2 February 2022 04:28 UTC](https://discourse.nodered.org/t/multidroping-on-modbus-rtu-node/57618 "2022-02-02T04:28:21Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![DSongra11\_forum.com](https://avatars.discourse-cdn.com/v4/letter/d/f04885/32.png) [@DSongra11\_forum.com](https://discourse.nodered.org/u/DSongra11_forum.com)\
**Post date:** [2 February 2022 04:28 UTC](https://discourse.nodered.org/t/multidroping-on-modbus-rtu-node/57618/1 "2022-02-02T04:28:21Z")

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Hello,

How to do Multidroping on Modbus RTU node.

I have multiple Energy Meters, I want to read parameters from each meter. I have checked with 1 Energy Meter and was able to get the data in node-red.

So how to configure in node-red for multiple Modbus RTU Energy Meter.

Br,  
Devendra Songra

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**Author:** ![Becker](https://avatars.discourse-cdn.com/v4/letter/b/c77e96/32.png) [@Becker](https://discourse.nodered.org/u/Becker)\
**Post date:** [2 February 2022 06:23 UTC](https://discourse.nodered.org/t/multidroping-on-modbus-rtu-node/57618/2 "2022-02-02T06:23:38Z")

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just like this:

 ![grafik](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/f/d/fd1e801545dd6f67091062bd6282f1e74817ba1f.png)

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<div class="post-metadata">

**Author:** ![DSongra11\_forum.com](https://avatars.discourse-cdn.com/v4/letter/d/f04885/32.png) [@DSongra11\_forum.com](https://discourse.nodered.org/u/DSongra11_forum.com)\
**Post date:** [2 February 2022 07:33 UTC](https://discourse.nodered.org/t/multidroping-on-modbus-rtu-node/57618/3 "2022-02-02T07:33:25Z")

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Hello,

I am asking just to add a single Modbus RTU node in the flow and access multiple devices parameters, what is the process.

Please find my node-red flow screenshot, with this flow I am getting data from 3 different devices but sometimes it gives a timeout error randomly.

 ![image](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/9/3/93f245b47158e2c2f21429b6334b04c7693dd03c.png)

Br,  
Devendra Songra

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<div class="post-metadata">

**Author:** ![Becker](https://avatars.discourse-cdn.com/v4/letter/b/c77e96/32.png) [@Becker](https://discourse.nodered.org/u/Becker)\
**Post date:** [2 February 2022 12:05 UTC](https://discourse.nodered.org/t/multidroping-on-modbus-rtu-node/57618/4 "2022-02-02T12:05:55Z")

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I just see "Modbus Read" - I don´t know what´s behind it. Is it 1 device or are this 4 devices?

Try "Modbus getter" and trigger it with a inject for example every 5s.

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<div class="post-metadata">

**Author:** ![DSongra11\_forum.com](https://avatars.discourse-cdn.com/v4/letter/d/f04885/32.png) [@DSongra11\_forum.com](https://discourse.nodered.org/u/DSongra11_forum.com)\
**Post date:** [2 February 2022 12:44 UTC](https://discourse.nodered.org/t/multidroping-on-modbus-rtu-node/57618/5 "2022-02-02T12:44:28Z")

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Hello,

now my issue is resolved I have changed Queue delay (ms) in Modbus node, and now it is continuously running with 3 devices.

I think I have to vary Queue delay (ms) if I connect multiple Modbus devices and more parameters.

Thanks for the help.

Br,  
Devendra Songra

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [3 April 2022 12:45 UTC](https://discourse.nodered.org/t/multidroping-on-modbus-rtu-node/57618/6 "2022-04-03T12:45:18Z")

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