Modbus entities not available - Nilan CTS700

Configuration
1

Hi,

I know there are Nilan HACS but they do not work for CTS700 yet. So I tried with modbus. So far the entities are in the modbus device and the YAML sends no faulty logs.
But all entities have an red dot with black exclamation mark.
The Nilan Handout for the modbus Registers says that the connexion is rtuovertcp.

I include my yaml:

- name: "NCS700"
    type: rtuovertcp
    host: 192.168.188.107
    port: 502
    # username: admin
    # password: 6699
    message_wait_milliseconds: 30
    timeout: 5
    delay: 3
    binary_sensors:
       - name: Next-Out-Filter-Change
         address: 20103
         slave: 1
       - name: Next-In-Filter-Change
         address: 20107
         slave: 1
    climates:         
       - name: Nilan_Temp_T3_Extract
         unique_id: T3_Extract_Air
         address: 20286
         slave: 1
         data_type: int16
         scale: 0.1
         precision: 2
         target_temp_register: 20286
         input_type: holding 
         temperature_unit: "°C"
    sensors:
       - name: Actual air humidity
         address: 21776
         slave: 1
         scale: 1
         # target_temp_register: 21776
         data_type: int16
         input_type: holding
         # measurement_unit: '%'
       - name: Register PLC
         address: 20003
         slave: 1
         data_type: int16
         input_type: holding

I have read a lot and some tell to log in with admin but user and password are not allowed in modbus.
I’m trying for three days now - nothing works out so far. maybe here is help.

Manfred