--- title: How do I configure a Janitza UMG 604/605-PRO kWh meters for Modbus TCP communication with the Maxem Energy Controller? description: Janitza 604 Janitza 605 Maxem DLM --- [Skip to content](https://support.maxem.io/how-do-i-configure-a-janitza-umg-604/605-pro-kwh-meters-for-modbus-tcp-communication-with-the-maxem-energy-controller#main-content) - [English](https://support.maxem.io/how-do-i-configure-a-janitza-umg-604/605-pro-kwh-meters-for-modbus-tcp-communication-with-the-maxem-energy-controller) - [Nederlands](https://support.maxem.io/nl/hoe-koppel-ik-de-janitza-umg-604/605-pro-via-modbus-tcp-aan-maxem-energy-cloud) English Show submenu for translations [![Logo-white](https://support.maxem.io/hs-fs/hubfs/Logo-white.png?width=230&height=37&name=Logo-white.png)](https://maxem.energy/) - Create support ticket Show submenu for Create support ticket - [Sales request](https://share-eu1.hsforms.com/2FZyysmEyRAKSZ2IKnHrf0Q2dyw99) - [Technical support](https://share-eu1.hsforms.com/26WB8z3cYTPWv02MIx6nr7w2dyw99) - [Finance support](https://share-eu1.hsforms.com/2mMsLOqRLQl2l8S6q3ZbgDA2dyw99) - [Report a bug](https://share-eu1.hsforms.com/220XTdV4ZQ726tz1CtoOw7A2dyw99) - [Feature request](https://share-eu1.hsforms.com/2g75JWLunRbqueEKBytvYvg2dyw99) Open main navigation Close main navigation - Create support ticket Show submenu for Create support ticket - [Sales request](https://share-eu1.hsforms.com/2FZyysmEyRAKSZ2IKnHrf0Q2dyw99) - [Technical support](https://share-eu1.hsforms.com/26WB8z3cYTPWv02MIx6nr7w2dyw99) - [Finance support](https://share-eu1.hsforms.com/2mMsLOqRLQl2l8S6q3ZbgDA2dyw99) - [Report a bug](https://share-eu1.hsforms.com/220XTdV4ZQ726tz1CtoOw7A2dyw99) - [Feature request](https://share-eu1.hsforms.com/2g75JWLunRbqueEKBytvYvg2dyw99) - - [English](https://support.maxem.io/how-do-i-configure-a-janitza-umg-604/605-pro-kwh-meters-for-modbus-tcp-communication-with-the-maxem-energy-controller) - [Nederlands](https://support.maxem.io/nl/hoe-koppel-ik-de-janitza-umg-604/605-pro-via-modbus-tcp-aan-maxem-energy-cloud) English Show submenu for translations How can we help you? - There are no suggestions because the search field is empty. 1. [Maxem Knowledge Base](https://support.maxem.io/?hsLang=en) 2. [Integrated Hardware](https://support.maxem.io/integrated-hardware?hsLang=en) 3. [kWh Meters](https://support.maxem.io/integrated-hardware?hsLang=en#kwh-meters) November 18, 2025 # How do I configure a Janitza UMG 604/605-PRO kWh meters for Modbus TCP communication with the Maxem Energy Controller? ##### **Introduction** This article explains how to configure Janitza UMG 604/605-PRO kWh meters for Modbus TCP communication with Maxem’s Energy Controller. ##### **Preparation** A smooth installation requires proper preparation. Before configuring the Janitza UMG 604/605-PRO kWh meter, both the kWh meter and Maxem’s Energy Controller must be successfully installed to ensure proper communication between the meter and the controller. ##### **Configuration steps** The meter is configured using **“Button 1” (9)** and **“Button 2” (10)**. The service button is intended for use only by trained service personnel. **Short press of Button 1 or Button 2:** - Scroll forward - Digit/value +1 **Long press of Button 1 or Button 2:** - Scroll backward - Digit/value -1 **Press both buttons simultaneously for 1 second:** - Switch between display mode and programming mode **![](https://support.maxem.io/hs-fs/hubfs/undefined-Oct-01-2025-02-42-20-0034-PM.png?width=670&height=781&name=undefined-Oct-01-2025-02-42-20-0034-PM.png)** Configuring the **Janitza UMG 604/605-PRO kWh meter** to communicate via **Modbus TCP** so that it can be read by the energy controller consists of two steps. ###### **Step 1: Set the correct transformation ratio for the Janitza UMG 604/605-PRO kWh meter** 1. Press both buttons simultaneously for approximately 1 second to activate **programming mode**. If no password is set (factory default), access to the programming menu is granted immediately. Programming mode is indicated on the display by the text **“PRG.”** **![](https://support.maxem.io/hs-fs/hubfs/undefined-Oct-01-2025-02-45-22-4265-PM.png?width=456&height=283&name=undefined-Oct-01-2025-02-45-22-4265-PM.png)** 2. Set the transformation ratio of the split-core current transformers for the primary and secondary current via addresses “000” and “001” for the three (identical) split-core current transformers for the three phases of the current measurement: - **Value L1, L2, and L3 (primary)** for address **“000”** - **Value L1, L2, and L3 (secondary)** for address **“001”** **![](https://support.maxem.io/hs-fs/hubfs/undefined-Oct-01-2025-02-49-52-5285-PM.png?width=670&height=561&name=undefined-Oct-01-2025-02-49-52-5285-PM.png)** ###### Step 2: Set the correct Ethernet settings for the Janitza UMG 604/605-PRO kWh meter 1. Navigate to **programming mode** on the meter display by pressing both buttons simultaneously for approximately 1 second. 2. Set a **static IP address** for the kWh meter as follows: - **192.168.25.10** for the first kWh meter - **192.168.25.11** for the second kWh meter - **192.168.25.12** for the third kWh meter, etc. 3. Set the **Subnet Mask** to **255.255.255.0**. 4. Set the **Gateway** to **192.168.25.1**. 5. By default, the kWh meter will use the following settings without further changes: 1. **Unit ID:** 1 2. **Port number:** 502 (Modbus TCP) 6. The settings for steps “2,” “3,” and “4” must be entered consecutively using the following addresses: - - **0** at address **205** (activate static IP) - **192** at address **300** (static IP) - **168** at address **301** (static IP) - **25** at address **302** (static IP) - **10** at address **303** for the first meter, **11** for the second meter, **12** for the third meter, etc. (static IP) - **255** at address **304** (subnet mask) - **255** at address **305** (subnet mask) - **255** at address **306** (subnet mask) - **0** at address **307** (subnet mask) - **192** at address **310** (gateway) - **168** at address **311** (gateway) - **25** at address **312** (gateway) - **1** at address **313** (gateway)    ![](https://support.maxem.io/hs-fs/hubfs/undefined-Oct-01-2025-05-44-32-5245-PM.png?width=670&height=363&name=undefined-Oct-01-2025-05-44-32-5245-PM.png) ##### **Configuration and Testing** After configuration, Maxem can verify whether the energy controller successfully communicates with the Janitza UMG 604/605-PRO kWh meter. If communication between the Janitza UMG 604/605-PRO kWh meter and the energy controller is not successfully established, repeat the steps from section **Configuration Steps** Note: This configuration must be performed by an installer who is experienced in configuring a Janitza UMG 604/605-PRO kWh meter, using the Janitza UMG 604/605-PRO kWh meter installation manual as a guideline. --- ##### **Manufacturer Manuals** Download the manufacturers manuals [here](https://www.janitza.com/en/downloads/user-manuals?q=604)   - [Start using Maxem](https://support.maxem.io/start-using-maxem?hsLang=en#main-content) - [Contact Maxem Sales](https://support.maxem.io/start-using-maxem?hsLang=en#contact-maxem-sales) - [Onboarding](https://support.maxem.io/start-using-maxem?hsLang=en#onboarding) - [Products & Services](https://support.maxem.io/products-services?hsLang=en#main-content) - [Charge Point Management System (CPMS)](https://support.maxem.io/products-services?hsLang=en#charge-point-management-system-cpms) - [Energy Management System (EMS)](https://support.maxem.io/products-services?hsLang=en#energy-management-system-ems) - [Maxem Energy Controller](https://support.maxem.io/products-services?hsLang=en#maxem-energy-controller) - [4G SIM cards](https://support.maxem.io/products-services?hsLang=en#4g-sim-cards) - [Maxem Energy Cloud](https://support.maxem.io/maxem-energy-cloud?hsLang=en#main-content) - [Getting started](https://support.maxem.io/maxem-energy-cloud?hsLang=en#getting-started) - [User accounts, Roles and Permissions](https://support.maxem.io/maxem-energy-cloud?hsLang=en#user-accounts-roles-and-permissions) - [Charging stations](https://support.maxem.io/maxem-energy-cloud?hsLang=en#charging-stations) - [Charge passes](https://support.maxem.io/maxem-energy-cloud?hsLang=en#charge-passes) - [Billing](https://support.maxem.io/maxem-energy-cloud?hsLang=en#billing) - [Search](https://support.maxem.io/maxem-energy-cloud?hsLang=en#search) - [Troubleshooting](https://support.maxem.io/maxem-energy-cloud?hsLang=en#troubleshooting) - [Static Load Balancing](https://support.maxem.io/maxem-energy-cloud?hsLang=en#static-load-balancing) - [Integrated Hardware](https://support.maxem.io/integrated-hardware?hsLang=en#main-content) - [Chargers](https://support.maxem.io/integrated-hardware?hsLang=en#chargers) - [kWh Meters](https://support.maxem.io/integrated-hardware?hsLang=en#kwh-meters) - [Battery Energy Storage System (BESS)](https://support.maxem.io/integrated-hardware?hsLang=en#battery-energy-storage-system-bess) - [PV Inverters](https://support.maxem.io/integrated-hardware?hsLang=en#pv-inverters) - [Subscriptions, invoices and payments](https://support.maxem.io/subscriptions-invoices-and-payments?hsLang=en) - [Support](https://support.maxem.io/support?hsLang=en#main-content) - [Technical support](https://support.maxem.io/support?hsLang=en#technical-support) - [Finance support](https://support.maxem.io/support?hsLang=en#finance-support) - [Release notes](https://support.maxem.io/support?hsLang=en#release-notes) - [Maxem News & Updates](https://support.maxem.io/support?hsLang=en#maxem-news-updates) [![](https://support.maxem.io/hs-fs/hubfs/Logo-Hi-res-Maxem.png?width=544&height=102&name=Logo-Hi-res-Maxem.png)](http://maxem.energy) Kabelweg 57, 1014 BA, Amsterdam, NL [mailto:support@maxem.energy](mailto:support@maxem.energy) Copyright © 2025, Maxem