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

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.”
   
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”

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)

 

 

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

Manufacturer Manuals

Download the manufacturers manuals here