Data update rate problem. Modbus and other

Configuration
1

Hi
Please help me solve the problem.
There is a task of reading parameters from two Eastron SDM630 V2 meters.
The meters have a Modbus RTU protocol.
I am converting it to Modbus TCP with the help of Elfin-EW11.

PROBLEM:
I can read the data, but there is a problem with the interval between points (data update rate). I need to make graphs with no more than 5 seconds between points, maybe even less.
At the moment, without any additional settings, the interval between the values is about 90 seconds, and this interval fluctuates.

I tried adding “scan_interval: 2”, but that did not solve the problem.
After that it shows 2 points at 1-2 second intervals, and then repeats the usual interval of ~90 seconds every 2 points.

Modbus protocol of the SDM630:

/config/configuration.yaml

# Loads default set of integrations. Do not remove.
default_config:

# Load frontend themes from the themes folder
frontend:
  themes: !include_dir_merge_named themes

# Text to speech
tts:
  - platform: google_translate

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

modbus: !include modbus.yaml

homeassistant:
  customize: !include customizations.yaml

config/modbus.yaml

  - type: tcp
    host: 192.168.88.123
    port: 8899
    name: "hub1"
    sensors:
      - name: sdm630b_frequency_of_supply_voltages
        address: 70
        input_type: input
        count: 2
        slave: 101
        precision: 2
        data_type: float32
        unit_of_measurement: Hz
        scan_interval: 2
        unique_id: 273bc377-c3ae-4ae9-afeb-0a5dbad68304
  
      - name: sdm630a_phase_2_line_to_neutral_volts
        slave: 100
        address: 2
        input_type: input
        count: 2
        precision: 2
        data_type: float32
        unit_of_measurement: V
        device_class: voltage
        unique_id: be929394-9daf-4f27-8c36-1ad79de68897

/config/customizations.yaml

sensor.sdm630a_import_wh_since_last_reset:
  state_class: total_increasing
  
sensor.sdm630a_export_wh_since_last_reset:
  state_class: total_increasing

sensor.sdm630b_import_wh_since_last_reset:
  state_class: total_increasing
  
sensor.sdm630b_export_wh_since_last_reset:
  state_class: total_increasing

Elfin EW11 RS485 Modbus RTU to Mdbus TCP settings:

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imgonline-com-ua-twotoone-5rG8QsfiDmtPolod1021×1603 45 KB