Creating Modbus Configuration for a Siemens LOGO!

CChris · February 15, 2023, 10:08pm

Hi There

Until now, I have implemented my Siemens LOGO by using NodeRed and a NodeRed Component which establishes the connection to the LOGO.
This is working fine - but I want to change that setup, because I am trying to get rid of such “middleware”… where its possible.

So, I decided to connect HA directly with the Siemens LOGO, using Modbus…
And… since it is the first time for me doing ANYTHING with Modbus (ok, at least without having a custom_component that do all the “hard work” - I am struggling a bit with this setup.

So… what do I need:

The whole reason for having a Siemens LOGO is to controll a Terrarium.
This solution was designed way before I started with HomeAssistant at all, and - of course, these Terrariums should work without the need of another server and so on…

OK… So, main Information I need at that point:

State of Light (binary sensor)
State of Heating (binary sensor)
State of Water-Pump (binary sensor)
current Temperature
current Humidity

Optional:
the configured time the light should go on and off
the configured time the heating should go on and off

So far, I was able to implement the binary sensors for the Lights, Heating, and watering - and also the temperature working…

Here’s my current configuration:

modbus:
  - name: "Terrarium Oscar"
    type: tcp
    host: 192.***.***.***
    port: 503

    binary_sensors:
      - name: "Daylight"
        slave: 1
        address: 8193
        input_type: coil
        device_class: light
      - name: "Heating" ...
      - name: "Water" ...
      
    sensors:
      - name: "Temperatur"
        #slave: 1
        address: 529
        input_type: holding
        unit_of_measurement: °C
        device_class: temperature
        state_class: measurement
        scan_interval: 30
        swap: word
        scale: 0.1
        precision: 2

      - name: "Humidity"
        #slave: 1
        address: 530
        input_type: holding
        unit_of_measurement: "%"
        device_class: humidity
        state_class: measurement
        scan_interval: 30
        swap: word
        scale: 0.01
        precision: 5

grafik

Here’s the information from the LOGO Software:
grafik

Here, you can see that Temperature should be on AM2 (but I am getting the value with using Address 529)
And the humidity should be on AM1 … but what address should I use here?
grafik

Anyway - In HomeAssistant, I only get the 0.0000 so, I guess, I am reading the wrong register… ?

And this is the same, but with the working NodeRed in HomeAssistant:

Any support would really be appreciated
Thanks a lot!

PeteRage · February 15, 2023, 10:17pm

Try 528 often there is an off by 1 on modbus addressing

CChris · February 15, 2023, 10:19pm

what a f******

Thanks

btw: I hate “off by one errors”

PeteRage · February 15, 2023, 10:26pm

Yeah, it’s a bit bizarre.

“ Zero vs. One Based Numbering

The Modbus specification says “Registers are addressed starting at zero. Therefore input registers numbered 1-16 are addressed as 0-15.” Unfortunately, that means a register documented with an address of 1221 (Frequency) must be requested by sending an address of 1220 (04C4 hex) to the WattNode. Most application software will automatically handle this subtraction, but if you are writing your own code or watching raw packet bytes, you need to be aware of this offset by one.”

CChris · February 15, 2023, 10:35pm

yeah - I know the reason for such errors… but haven’t thought that this could be the reason.
Honestly speaking - at least with the Address of the temperature being off by one - I SHOULD have recognized this … :-/

[[ But why did it then work with the addresses 8193, 8194 and 8195 ? They aren’t off by one… ]]

OK, but maybe another question:
Do you have an idea, how I can get the values from a Clock-Block in the LOGO?

Meaning here the timers when the Daylight / Heating should switch ON or OFF (and maybe, if it is summer or winter-time)
grafik

In the NodeRed, I can read these …
grafik

The Return value from NodeRed is (as far as I remember) an Integer, which needs to be calculated / converted then…

var asHex = parseInt(msg.payload).toString("16").padStart(4, "0");
var hh = asHex.substring(0, 2);
var mm = asHex.substring(2, 4);
msg.topic = "Daylight Sunrise"
msg.payload = `${hh}:${mm}`

probably I need to write this into a variable (V) which is Coil 1 - 6808 … ?

PeteRage · February 15, 2023, 10:56pm

That’s a good question, don’t know. Is node red reading it from modbus?

CChris · February 15, 2023, 11:00pm

It’s getting too late.
Actually, I made the same mistake on the binary_sensors (but it was correct the first time - and changed it to the wrong address later… did not recognize that, because the lights are currently all off [it’s nearly mid night here] …)

Time for getting some sleep

and no - NodeRed is not using modbus here - as far as I know.

Pez · April 16, 2023, 8:56am

hallo
Bin Neu hier. Habe HA Installiert und mmi Siemens Logo zum Laufen gekriegt.
dank eurer Hilfe kann ich Siemens Logo auch Auslesen

automation: !include automations.yaml
script: !include scripts.yaml
scene: !include scenes.yaml

modbus:

name: “hub1”
close_comm_on_error: true
delay: 1
timeout: 1
type: tcp
host: 192.168.178.46
port: 502
binary_sensors:
- name: “Heizstab 1”
  slave: 1
  address: 8201
  input_type: coil
  device_class: light
  scan_interval: 1
- name: “Heizstab 2”
  slave: 1
  address: 8200
  input_type: coil
  device_class: light
  scan_interval: 1
- name: “Heizstab 3”
  slave: 1
  address: 8199
  input_type: coil
  device_class: light
  scan_interval: 1
  sensors:
- name: “Aussen Temperatur”
  #slave: 1
  address: 31
  input_type: holding
  unit_of_measurement: °C
  device_class: temperature
  state_class: measurement
  scan_interval: 30
  swap: word
  precision: 2
- name: “Wassertemperatur”
  #slave: 1
  address: 32
  input_type: holding
  unit_of_measurement: “°C”
  device_class: temperature
  state_class: measurement
  scan_interval: 30
  swap: word

Möchte jetzt vom Goodwe Inverter “sensor.active_power” Werte an Siemens Logo Senden.
Kann Jemand Helfen?
Danke

gabrio79 · February 19, 2024, 3:09pm

Hello, could you help me to configure the Logo in order to working via MODBUS instead of S7 via NODERED?

warpreality · April 7, 2024, 4:32pm

Greetings! Today i post my manual about siemens logo + HA on habr.com
Siemens LOGO, Home assistant, или моё видение умного дома / Хабр

Ahrand · April 19, 2024, 5:15am

The newest HW release (8.4) has built in MQTT support : LOGO! Logic Module - Siemens Global
Has anybody had the chance to experiment with it ?
With integrated MQTT, this version seems like a natural HA fit ?