# I cant read more than 5 modbus Holding register
**URL:** https://discourse.nodered.org/t/i-cant-read-more-than-5-modbus-holding-register/89730
**Category:** General
**Tags:** node-red-dashboard, modbus
**Created:** [24 July 2024 16:23 UTC](https://discourse.nodered.org/t/i-cant-read-more-than-5-modbus-holding-register/89730 "2024-07-24T16:23:23Z")
**Posts on this page:** 15
**Page:** 1
### Author:  [@nago93](https://discourse.nodered.org/u/nago93)
#### Post date: [24 July 2024 16:23 UTC](https://discourse.nodered.org/t/i-cant-read-more-than-5-modbus-holding-register/89730/1 "2024-07-24T16:23:23Z")
Hi! Im creating a Dashboard to show diferent values extracted from an equipment. I can read the just 5 modbus adress, but when I try to get 6 or more readings lost all the connections. How can I fix it?
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### Author:  [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)
#### Post date: [24 July 2024 19:11 UTC](https://discourse.nodered.org/t/i-cant-read-more-than-5-modbus-holding-register/89730/2 "2024-07-24T19:11:40Z")
Hi unfortunately nowhere near enough info I'm afraid.
What device is it? What address are you accessing? Can you link to a manual that lists the registers?
Lastly, can you clarify this ...
> [@nago93](#):
>
> but when I try to get 6 or more readings lost all the connections
... What exactly happens?
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### Author:  [@nago93](https://discourse.nodered.org/u/nago93)
#### Post date: [25 July 2024 02:56 UTC](https://discourse.nodered.org/t/i-cant-read-more-than-5-modbus-holding-register/89730/3 "2024-07-25T02:56:01Z")
Hi! Im Agree, I going to try to be clearest:
**Device:** Battery Energy Storage System-
**Address:** I can read any address, but just 5 as maximum, If I try to read 6 address so it disconnect some nodes.
In the first image Just **reading 5 address** (from 12295 to 12299) and all ok:
In the second image **trying to read 6 address** (from 12295 to 12300) but I dont understand why it disconnect some nodes:
**Function Code:** 3 read holding register
**Poll rate:** 2 seconds
best regards!!
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### Author:  [@smanjunath211](https://discourse.nodered.org/u/smanjunath211)
#### Post date: [25 July 2024 03:37 UTC](https://discourse.nodered.org/t/i-cant-read-more-than-5-modbus-holding-register/89730/4 "2024-07-25T03:37:53Z")
I read 60 registers with no issue but use only one node. why do you have so many nodes ?
can you not put address 12295 and put 10 quantity ?
can you show the setting of the node like above ?
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### Author:  [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)
#### Post date: [25 July 2024 05:26 UTC](https://discourse.nodered.org/t/i-cant-read-more-than-5-modbus-holding-register/89730/5 "2024-07-25T05:26:08Z")
> [@nago93](#):
>
> In the first image Just **reading 5 address** (from 12295 to 12299) and all ok:
>
> 
This is the least efficient and most problematic way of gathering data I'm afraid. This document has some good advice and practical info directly related to your requirement: [Modernize your legacy industrial data. Part 2. • FlowFuse](https://flowfuse.com/blog/2023/09/modernize-your-legacy-industrial-data-part2/)
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### Author:  [@nago93](https://discourse.nodered.org/u/nago93)
#### Post date: [27 July 2024 19:39 UTC](https://discourse.nodered.org/t/i-cant-read-more-than-5-modbus-holding-register/89730/6 "2024-07-27T19:39:46Z")
Thanks, I Feel this is the best option. But Im concerning about use just one node in my scenarios , let me show you how the registers address are distributed:
In this case, is ok read in one node from 257 until 24643 address? it mean 24386 registers, I feel it is a lot, but Im not sure if it is any problem.
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### Author:  [@nago93](https://discourse.nodered.org/u/nago93)
#### Post date: [27 July 2024 19:42 UTC](https://discourse.nodered.org/t/i-cant-read-more-than-5-modbus-holding-register/89730/7 "2024-07-27T19:42:24Z")
Thanks! I read it, it is too helpful to understand more about the modbus efficiency!
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### Author:  [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)
#### Post date: [27 July 2024 19:50 UTC](https://discourse.nodered.org/t/i-cant-read-more-than-5-modbus-holding-register/89730/8 "2024-07-27T19:50:11Z")
> [@nago93](#):
>
> is ok read in one node from 257 until 24643 address? it mean 24386 registers, I feel it is a lot
No, the maximum read count is 125 registers in one request.
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### Author:  [@nago93](https://discourse.nodered.org/u/nago93)
#### Post date: [27 July 2024 20:45 UTC](https://discourse.nodered.org/t/i-cant-read-more-than-5-modbus-holding-register/89730/9 "2024-07-27T20:45:59Z")
Got it. So, it is a limitation for my case? is any way to get all the data? or should I look for something different to node-red?
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### Author:  [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)
#### Post date: [27 July 2024 21:19 UTC](https://discourse.nodered.org/t/i-cant-read-more-than-5-modbus-holding-register/89730/10 "2024-07-27T21:19:36Z")
The limitation is the modbus specification, not node-red. Other software will have exactly the same limitations. The are some exceptions like certain PLC's but typically, 125 is the protocol limitation
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### Author:  [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)
#### Post date: [27 July 2024 21:31 UTC](https://discourse.nodered.org/t/i-cant-read-more-than-5-modbus-holding-register/89730/11 "2024-07-27T21:31:18Z")
Your best bet is to read those ranges 1 at a time by connecting the modbus nodes in series instead of parallel.
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### Author:  [@nago93](https://discourse.nodered.org/u/nago93)
#### Post date: [27 July 2024 21:53 UTC](https://discourse.nodered.org/t/i-cant-read-more-than-5-modbus-holding-register/89730/12 "2024-07-27T21:53:27Z")
Thanks, do you mean something similar like this?? [How to create an Modbus-TCP alarm status dashboard - #20 by Steve-Mcl](https://discourse.nodered.org/t/how-to-create-an-modbus-tcp-alarm-status-dashboard/43041/20)
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### Author:  [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)
#### Post date: [27 July 2024 22:48 UTC](https://discourse.nodered.org/t/i-cant-read-more-than-5-modbus-holding-register/89730/13 "2024-07-27T22:48:41Z")
In series, like that example, yes.
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### Author:  [@nago93](https://discourse.nodered.org/u/nago93)
#### Post date: [28 July 2024 14:05 UTC](https://discourse.nodered.org/t/i-cant-read-more-than-5-modbus-holding-register/89730/14 "2024-07-28T14:05:29Z")
thanks it work for me. Is my first time in this forum and the experience was so good.
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### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [11 August 2024 14:06 UTC](https://discourse.nodered.org/t/i-cant-read-more-than-5-modbus-holding-register/89730/15 "2024-08-11T14:06:23Z")
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