Configuring Modbus Devices


Connected Modbus devices can be used, for example, as energy meters for generation and consumption data at the grid-connection point or for energy monitoring. For this, predefined Modbus profiles, user-created Modbus profiles or the SunSpec Modbus profile must be used. The Modbus profiles will then be assigned to the Modbus devices.

IP addresses of Modbus devices

In systems with Modbus devices, static IP addresses must be assigned to all Modbus devices. Suitable IP addresses can be assigned to the Modbus devices from the free address supply of the network segment either manually or dynamically via DHCP.

If the IP addresses are to be assigned dynamically, DHCP must be activated in the router (see the router manual). Make sure that the Modbus devices do not contain variable IP addresses but always the same IP addresses (static DHCP).

This also applies to data managers that are used as subordinated devices (slaves).

Creating a New Modbus Profile

  1. Log into the user interface of the Data Manager.
  2. Select the menu item Device administration in the menu Configuration.
  3. Select the button.
  4. Select Modbus devices and confirm with [Next].
  5. Select Manage your own Modbus profiles.
  6. Select Create a new Modbus profile.
  7. Fill out the entry fields and select [Save].

Registering a New Modbus Device and Assigning a Modbus Profile

Requirements:

  • The Modbus devices must be in operation and connected to the Data Manager.

Procedure:

  1. Log into the user interface of the Data Manager.
  2. Select the menu item Device administration in the menu Configuration.
  3. Select the button.
  4. Select Modbus devices and confirm with [Next].
  5. Fill out the input fields and confirm with [Next].
  6. Available Modbus devices in the system are searched for and displayed.
  7. Select the Modbus devices to be added to the system and select [Save].
  • The connected Modbus device can be used as an energy meter for generation and consumption data at the point of interconnection, for energy monitoring or as sensor for wind speed, solar irradiation, and temperature.

SunSpec Modbus Profile

The product supports the standardized SunSpec Modbus profile via the interface of the Modbus client (Modbus TCP/RTU). The connected Modbus devices must conform with the SunSpec specification (see manufacturer manual). The mandatory data of the following SunSpec models are supported:

Common model:

  • 1, 11, 12

PV inverter:

  • 101, 102, 103, 120, 121, 122, 123, 126, 127, 128, 129, 130, 131, 132, 160

Energy meters:

  • 201, 202, 203, 204, 211, 212, 213, 214