# Controlling Schneider SE8000 with nodered modbus
**URL:** https://discourse.nodered.org/t/controlling-schneider-se8000-with-nodered-modbus/61765
**Category:** Industrial
**Tags:** modbus
**Created:** [25 April 2022 18:59 UTC](https://discourse.nodered.org/t/controlling-schneider-se8000-with-nodered-modbus/61765 "2022-04-25T18:59:16Z")
**Posts on this page:** 15
**Page:** 1
### Author:  [@guguzanini](https://discourse.nodered.org/u/guguzanini)
#### Post date: [25 April 2022 18:59 UTC](https://discourse.nodered.org/t/controlling-schneider-se8000-with-nodered-modbus/61765/1 "2022-04-25T18:59:16Z")
Hello,
We are trying to communicate, read and control the Schneider SE8000 with modbus (room controller for HVAC Fan Coil applications) using the library node-red-contrib-modbus, but I cant even read the input or coil status. Someone already did this or something similar to help?
I tried to upload the modbus integration guide attachments but new users cant upload any file, so I'm leaving some links to you know what device it is.
[link 1 to installation guide]([II-SE8300-A4.PDF (schneider-electric.com)](https://iportal2.schneider-electric.com/Contents/docs/II-SE8300-A4.PDF))
[Link 2 to User Interface guide](http://www.kele.com/Catalog/22%20Thermostats_Controllers/PDFs/SE8000%20Series%20Interface%20Guide-2014.pdf)
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### Author:  [@UnborN](https://discourse.nodered.org/u/UnborN)
#### Post date: [26 April 2022 14:37 UTC](https://discourse.nodered.org/t/controlling-schneider-se8000-with-nodered-modbus/61765/2 "2022-04-26T14:37:31Z")
Hello ..
link 2 is down .. from link 1 that you have shared it seems that your device is using BACnet protocol instead of Modbus. (unless you have shared the wrong manual)
If its indeed Bacnet maybe look into this node instead
> **[node-red-contrib-bacnet](https://flows.nodered.org/node/node-red-contrib-bacnet)**
>
> The BACnet toolbox package for Node-RED.
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### Author:  [@guguzanini](https://discourse.nodered.org/u/guguzanini)
#### Post date: [26 April 2022 15:46 UTC](https://discourse.nodered.org/t/controlling-schneider-se8000-with-nodered-modbus/61765/3 "2022-04-26T15:46:52Z")
Hello!
No no, we are using Modbus, I've just uploaded the manual so everyone can see wich model it is, I'll send pictures of the device and modbus node configuration for you soon as I can.
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### Author:  [@guguzanini](https://discourse.nodered.org/u/guguzanini)
#### Post date: [26 April 2022 17:18 UTC](https://discourse.nodered.org/t/controlling-schneider-se8000-with-nodered-modbus/61765/4 "2022-04-26T17:18:06Z")
Hello! Follow attached pictures from the device configuration.
Following this configuration, how can I configure the node to read and control it? I tried so many ways and configuration and none has worked (I'm new at nodered)
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### Author:  [@UnborN](https://discourse.nodered.org/u/UnborN)
#### Post date: [26 April 2022 18:17 UTC](https://discourse.nodered.org/t/controlling-schneider-se8000-with-nodered-modbus/61765/5 "2022-04-26T18:17:15Z")
and the settings of your Modbus configuration node ?
have you confirmed that the baud rate, parity, device id match
and the polarity of the RS485 connection wires ?
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### Author:  [@guguzanini](https://discourse.nodered.org/u/guguzanini)
#### Post date: [26 April 2022 19:45 UTC](https://discourse.nodered.org/t/controlling-schneider-se8000-with-nodered-modbus/61765/6 "2022-04-26T19:45:12Z")
Hello,
We are sending pictures of the node (blank) that we are using.
PS: We'll reply with two more pictures because new users cant upload more than 2 media files at once
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### Author:  [@guguzanini](https://discourse.nodered.org/u/guguzanini)
#### Post date: [26 April 2022 19:46 UTC](https://discourse.nodered.org/t/controlling-schneider-se8000-with-nodered-modbus/61765/7 "2022-04-26T19:46:25Z")
Hello,
Follow the 2 extra pictures of the configuration
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### Author:  [@UnborN](https://discourse.nodered.org/u/UnborN)
#### Post date: [26 April 2022 20:39 UTC](https://discourse.nodered.org/t/controlling-schneider-se8000-with-nodered-modbus/61765/8 "2022-04-26T20:39:24Z")
Hi .. i think what Schneider calls COM Address must be the device's Modbus Unit-Id address
Have you tried filling in the node's config the number **5** for the Unit-Id
Also what OS are you using for your Node-red system ? Is it on Windows
What device are you using on the Node-red system in order to use Modbus ?
a USB to Serial converter ? something else ? Can you confirm this device is on COM5 ?
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### Author:  [@guguzanini](https://discourse.nodered.org/u/guguzanini)
#### Post date: [27 April 2022 09:03 UTC](https://discourse.nodered.org/t/controlling-schneider-se8000-with-nodered-modbus/61765/9 "2022-04-27T09:03:38Z")
Hello,
Yeah, we tried to put 5 on the Unit-Id.
Answering the other questions:
Windows? Yeah, Windows 10.
We're using an Serial converter/USB device from "Mercato automação" (link below), and yes, it is on COM5 when the driver is identified.
We'll run another test today so I'll fill the next topic with more pictures and info, maybe we'll try to to a different connection on the D+ and D- of the converter, now we are connecting + (SE8000) to + (Converter) and - (SE8000) to - (Converter)
Follow Link below.
> **[MC-USB | MERCATO | Conversor RS-485 para USB](https://www.mercatoautomacao.com.br/collections/controladores/products/mercato-mc-usb)**
>
> O MC-USB é uma interface para conversão do meio físico de comunicação padrão serial 485 para USB. Utilizado para integrar equipamentos de campo, de comunicação serial, com softwares de configuração ou outros equipamentos. Nos produtos Mercato das...
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### Author:  [@guguzanini](https://discourse.nodered.org/u/guguzanini)
#### Post date: [27 April 2022 09:19 UTC](https://discourse.nodered.org/t/controlling-schneider-se8000-with-nodered-modbus/61765/10 "2022-04-27T09:19:20Z")
Hello,
On quantity, its the qtd of coils that I want to control, right? So, in this case its 1.
In the "Address" field, I put the Modbus Address Command that I want to sent, right? For example, to read room temperature I would put 30001:
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### Author:  [@UnborN](https://discourse.nodered.org/u/UnborN)
#### Post date: [27 April 2022 11:00 UTC](https://discourse.nodered.org/t/controlling-schneider-se8000-with-nodered-modbus/61765/11 "2022-04-27T11:00:34Z")
> [@guguzanini](#):
>
> On quantity, its the qtd of coils that I want to control, right? So, in this case its 1.
Yes .. thats correct
> [@guguzanini](#):
>
> In the "Address" field, I put the Modbus Address Command that I want to sent, right?
yes .. the address that you want to read or write to
> [@guguzanini](#):
>
> For example, to read room temperature I would put 30001:
try 30001 but if that doesnt work also try Register **1** and in Function Code **4**
(as stated in the Modbus Register column in the table you shared)
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### Author:  [@guguzanini](https://discourse.nodered.org/u/guguzanini)
#### Post date: [28 April 2022 16:43 UTC](https://discourse.nodered.org/t/controlling-schneider-se8000-with-nodered-modbus/61765/12 "2022-04-28T16:43:29Z")
Hello,
We tested with both configuration and it failed, and also have identified a problem with a connection from the node to the port, it keep appearing the message "Reconnecting" every time. Soon I'll upload the video
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### Author:  [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)
#### Post date: [28 April 2022 16:52 UTC](https://discourse.nodered.org/t/controlling-schneider-se8000-with-nodered-modbus/61765/13 "2022-04-28T16:52:27Z")
> [@guguzanini](#):
>
> We're using an Serial converter/USB device from "Mercato automação"
Do you see any activity on the TX/RX LEDs?
You might want to invest in something like [RS-422/485 ComProbe for Serialtest; Monitors and captures Asynchronous RS-422/485 Serial Communications](https://fte.com/products/serialanalyzers-rs422485.aspx) to verify the data is making it to / from the device.
Alternatively, connect a [virtual serial port COM9](https://www.virtual-serial-port.org/) to COM5 and communicate from node-red to COM9 - use the Virtual Tool to analyze serial comms traffic.
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### Author:  [@UnborN](https://discourse.nodered.org/u/UnborN)
#### Post date: [28 April 2022 17:18 UTC](https://discourse.nodered.org/t/controlling-schneider-se8000-with-nodered-modbus/61765/14 "2022-04-28T17:18:50Z")
Along with Steve's suggestions ..
1. can you also try to read using a seperate Modbus Master software to see if the reconnection issue is due to the node or something else.
### QModMaster ([link](https://sourceforge.net/projects/qmodmaster/))
1. What version nodejs are you running on your Windows system?
Note that the latest 5.21.2 version of Modbus nodes support up to Nodejs v14
(connection issues were reported on [Github](https://github.com/BiancoRoyal/node-red-contrib-modbus) with anyting higher)
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### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [27 June 2022 17:19 UTC](https://discourse.nodered.org/t/controlling-schneider-se8000-with-nodered-modbus/61765/15 "2022-06-27T17:19:11Z")
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