LM und Daikin RTD-W - Modbus - Printable Version

LM und Daikin RTD-W - Modbus - Printable Version

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LM und Daikin RTD-W - Modbus - mkoermer - 19.10.2020

Hello everybody,

has any of you already successfully connected the Daikin RTD-W to the LM?
Regardless of which Modbus address I give the device, it is not found by the LM - manual integration does not work either, as there is no connection to the device.

Here is the page for the Daikin RTD-W device:
https://www.daikin.de/de_de/produkte/RTD-W.html

maybe someone knows some advice?

Best regards
Michael

RE: LM und Daikin RTD-W - Modbus - admin - 19.10.2020

Have you tried using another RS485 port? Maybe A/B are swapped? You can also try USB-RS485 adapter and connect to your PC to check if it works. Maybe the serial port settings are wrong?

RE: LM und Daikin RTD-W - Modbus - mkoermer - 19.10.2020

Hello,
I activated RTU1 and set the settings for this connection to the values according to the manual - unfortunately without success.
I also tested all other options, but the device cannot be found.

I tried different Modbus addresses - from 1 to 8 everything already tested, but without success.

I don't have an RS485 / USB adapter yet ...

still have an idea? ;-)

Best regards
Michael

RE: LM und Daikin RTD-W - Modbus - Daniel - 19.10.2020

How do you test? Do you use RTU read test?

RE: LM und Daikin RTD-W - Modbus - alexll - 19.10.2020

Be aware about the connection settings:

Mode Modbus RTU Slave
Baud rate 9600
Parity None
Stop bits 1
Registry base 0

From https://www.acae.es/catalogos/daikin/fiebdc/es-rtd-w-installation-instructions-20670-1-07-tcm135-268899.pdf (in Spanish)

RE: LM und Daikin RTD-W - Modbus - mkoermer - 19.10.2020

have made these settings ... unfortunately no improvement ...

... no device is found.

RE: LM und Daikin RTD-W - Modbus - Daniel - 19.10.2020

Are you using RTU SCAN? This can work only if you already have valid profile. Use RTU read test and try to read individual registry.

RE: LM und Daikin RTD-W - Modbus - mkoermer - 19.10.2020

Yes, I used RTU Scan without having a profile for it - now I have acc. want to read out the holding register H0001 according to the instructions - the following error message ;-(

RE: LM und Daikin RTD-W - Modbus - Daniel - 19.10.2020

Do you have documentation in EN?
Check cable and make sure GND is connected.

RE: LM und Daikin RTD-W - Modbus - mkoermer - 19.10.2020

yes ;-)
look here:
http://www.realtime-controls.co.uk/rtd/DE%20RTD-W%20Installation%20Instructions%2020670-1.07.pdf

(Link)

thank you for your help!

(19.10.2020, 10:34)Daniel. Wrote: Do you have documentation in EN?
Check cable and make sure GND is connected.

HI Daniel,

cable is ok, and GND ist connected!

Best regards
Michael

RE: LM und Daikin RTD-W - Modbus - Daniel - 19.10.2020

Doc is in DE so I partially understand it. Did you change the default RTU settings? Do not use address 0, change it to 1 at last.

RE: LM und Daikin RTD-W - Modbus - mkoermer - 19.10.2020

(19.10.2020, 10:57)Daniel. Wrote: Doc is in DE so I partially understand it. Did you change the default RTU settings? Do not use address 0, change it to 1 at last.

sorry, look here:
http://tinlavir.ro/parteneri/2_VRV/4_Control_Systems/10_RTD_Adaptors/Documents/RTD-W/EN%20RTD-W%20Installation%20Instructions%2020670-1.07.pdf

Link

you mean the Modbus address of the device? currently only DIP 8 is on = Modbus address 1.

I get the following error message when I manually integrate the device - I created a profile with a template.

RE: LM und Daikin RTD-W - Modbus - Daniel - 19.10.2020

Do I understand it right that the same interface is used for D-bus and for Modbus? If yes then somehow it must be switched over. Manual says nothing about it. Do not use address 0 as in default change to 1. For testing use holding registers, int16.

RE: LM und Daikin RTD-W - Modbus - admin - 19.10.2020

Please provide your profile

RE: LM und Daikin RTD-W - Modbus - mkoermer - 19.10.2020

Short intermediate result, if I now query a holding register under RTU read test z. B. H0001 (i.e. 1) I also get an answer from the device!

Here is the picture.

d. H. but that the connection to the device works right?

But then why the error message?

(19.10.2020, 11:27)admin Wrote: Please provide your profile

Code:
{

  "product_code": "RT",

  "manufacturer": "Realtime",

  "name": "RTD-W Control",

  "product_range": "Realtime Modbus",

  "description": "Realtime Modbus RT ",

  "mapping": [

    {

      "name": "Sollwert Wasservorlauf Heizen",

      "address": "H0001",

      "bus_datatype": 7,

      "datatype": "uint16",

      "type": "register",

      "units": "Grad",

      "read_swap": "n"

    },

    {

      "name": "Sollwert Wasservorlauf Kuehlen",

      "address": "H0002",

      "bus_datatype": 7,

      "datatype": "uint16",

      "type": "register",

      "units": "Grad",

      "read_swap": "n"

    },

    {

      "name": "Betrieb ein/aus",

      "address": "H0004",

      "bus_datatype": 1,

      "datatype": "bool",

      "type": "register",

      "units": "",

      "read_swap": "n"

    },

    {

      "name": "Auslesen Betrieb ein/aus",

      "address": "I0070",

      "bus_datatype": 1,

      "datatype": "bool",

      "type": "register",

      "units": ""

    }

  ]

}

RE: LM und Daikin RTD-W - Modbus - admin - 19.10.2020

address field must be a number, not a string

RE: LM und Daikin RTD-W - Modbus - Daniel - 19.10.2020

Datatype is not bool this device support only registers which are int16 or uint16. You must add scaling of 0.01 for your temp. Read swap is not needed.

RE: LM und Daikin RTD-W - Modbus - mkoermer - 19.10.2020

HI,
Thanks for your help!!!

Look here:

Code:
{

  "product_code": "RT",

  "manufacturer": "Realtime",

  "name": "RTD-W Control",

  "product_range": "Realtime Modbus",

  "description": "Realtime Modbus RT ",

  "mapping": [

    {

      "name": "Sollwert Wasservorlauf Heizen",

      "address": 1,

      "bus_datatype": 7,

      "datatype": "uint16",

      "type": "register",

      "units": "Grad"

    },

    {

      "name": "Sollwert Wasservorlauf Kuehlen",

      "address": 2,

      "bus_datatype": 7,

      "datatype": "uint16",

      "type": "register",

      "units": "Grad"

    }

  ]

}

would it be ok?

RE: LM und Daikin RTD-W - Modbus - Daniel - 19.10.2020

You still missing "value_multiplier": 0.01, as those two are temps.

RE: LM und Daikin RTD-W - Modbus - mkoermer - 19.10.2020

so?

Code:
{

  "product_code": "RT",

  "manufacturer": "Realtime",

  "name": "RTD-W Control",

  "product_range": "Realtime Modbus",

  "description": "Realtime Modbus RT ",

  "mapping": [

    {

      "name": "Sollwert Wasservorlauf Heizen",

      "address": 1,

      "bus_datatype": 7,

      "datatype": "uint16",

      "type": "register",

      "units": "Grad",

      "value_multiplier": "0.01"

    },

    {

      "name": "Sollwert Wasservorlauf Kuehlen",

      "address": 2,

      "bus_datatype": 7,

      "datatype": "uint16",

      "type": "register",

      "units": "Grad",

      "value_multiplier": "0.01"

    }

  ]

}