WAGO Fieldbus Coupler 750-352

Integrates the WAGO Fieldbus Coupler 750-352 into OpenEMS for dynamic configuration and control of WAGO extension modules (inputs and outputs) via Modbus communication.

Overview

This bundle provides integration for the WAGO Fieldbus Coupler 750-352, an industrial-grade programmable logic controller (PLC) with modular I/O capabilities. The component dynamically reads the WAGO device’s fieldbus coupler configuration and creates OpenEMS channels for each configured input and output module.

The WAGO fieldbus coupler communicates via Modbus TCP/IP protocol over standard networks. The integration handles configuration synchronization with the device and provides automatic channel mapping for digital inputs, digital outputs, and relay modules.

All supported WAGO modules are dynamically discovered and configured based on the device’s internal configuration. The component supports multiple extensions and provides flexible channel naming conventions for easy integration into OpenEMS systems.

Supported Devices

Components

This bundle implements the following OpenEMS Component:

WAGO Fieldbus Coupler 750-352

Name: IO WAGO Fieldbus Coupler 750-352

Factory-PID: io.openems.edge.wago

Implemented Natures/Interfaces

  • DigitalInput

  • DigitalOutput

  • ModbusComponent

Configuration Parameters

  • id (String): Component ID for unique identification (default: "io0")

  • alias (String): Human-readable alias for the component

  • enabled (Boolean): Enable/disable this component (default: true)

  • modbus_id (String): ID of Modbus bridge for TCP communication (default: "modbus0")

  • username (String): Username for WAGO device authentication (default: "admin")

  • password (String): Password for WAGO device authentication (default: "wago")

Module Channel Naming

The component dynamically creates channels based on the WAGO device configuration. Channel names follow this naming convention:

WAGO 750-523 "1-channel relay output"

  • {id}/RelayM{X} - Relay output on extension X

  • {id}/RelayM{X}Hand - Manual switch state on extension X

WAGO 750-501 "2-channel digital output"

  • {id}/DigitalOutputM{X}C1 - First digital output on extension X

  • {id}/DigitalOutputM{X}C2 - Second digital output on extension X

WAGO 750-400 "2-channel digital input"

  • {id}/DigitalInputM{X}C1 - First digital input on extension X

  • {id}/DigitalInputM{X}C2 - Second digital input on extension X

Where {id} is the Component-ID (default: "io0") and {X} is the extension number (M1, M2, M3, etc.).

Prerequisites / Dependencies

System Requirements

  • Network connectivity: WAGO device must be reachable via Modbus TCP/IP on the network

  • Modbus bridge: A Modbus TCP bridge component must be configured and enabled

  • Local Network: WAGO device must be on the same network as OpenEMS Edge

WAGO Device Setup

  1. Access the WAGO device web interface (default IP usually 192.168.1.1, username: admin, password: wago)

  2. Navigate to "IO config"

  3. Configure the desired extension modules

  4. Click "create ea-config.xml" to generate the configuration file

  5. Ensure the configuration is saved and activated on the device

  6. Note the device’s IP address and Modbus TCP port (default: 502)

  7. Configure the OpenEMS Modbus TCP bridge to connect to the WAGO device

  8. Configure this component with the corresponding Modbus-ID

Source Code