MENNEKES AMTRON® Compact 2.0s & Start 2.0s

Use cases

• Monitor real-time EV charging power and session energy on a cloud dashboard for each customer site.
• Create an alert when EVSE state indicates a fault or when wallbox temperature exceeds safe limits.
• Control charging current remotely to implement solar surplus charging without on-site visits.
• Log total charged energy per wallbox to generate monthly consumption reports for fleet or tenant billing.
• Enable dynamic phase switching on the 11 kW model to maximize self-consumption from a rooftop PV system.
• Set charging release to prevent or allow charging based on time-of-use tariff schedules.

Installation

1. 1Connect the Modbus RTU wiring (A and B terminals) from the ModbusCloud gateway to the RS-485 port on the MENNEKES AMTRON wallbox.
2. 2Set DIP switches 4, 5, and 7 of bank S1 to ON on the wallbox and restart it to enable solar-controlled Modbus satellite mode.
3. 3Verify or adjust the wallbox Modbus address (default 50), baud rate (57600), data bits (8), and stop bits (2) using the MENNEKES configuration tool.
4. 4Configure the ModbusCloud gateway serial port to match: 57600 baud, 8 data bits, 2 stop bits, and the correct Modbus RTU slave address.
5. 5Import the MENNEKES AMTRON Compact 2.0s and Start 2.0s template from the ModbusCloud template library and assign it to the gateway.
6. 6If using the 11 kW model with dynamic phase switching, activate this option in the MENNEKES configuration tool before commissioning.

Things to watch for

01

The wallbox stops responding to Modbus commands after a few seconds. What is wrong?

The template requires a heartbeat write (value 0x55AA to register 3328) at least every 10 seconds. If the heartbeat is missing or delayed, the wallbox ignores external commands. Ensure the ModbusCloud gateway polling cycle is fast enough to maintain this interval.

02

Which baud rate and serial settings should I use?

The factory default is 57600 baud, 8 data bits, and 2 stop bits. From firmware v2.0 onward these can be changed with the MENNEKES configuration tool. The gateway must match exactly.

03

Dynamic phase switching does not work on my 11 kW wallbox. Why?

This feature must be explicitly activated using the MENNEKES configuration cable and configuration tool before it can be controlled via Modbus. It is only available on the AMTRON Compact 2.0s 11 C2 model.

04

What firmware version does the wallbox need?

Wallbox firmware v2.0 (released March 2024) or later is required. MENNEKES recommends updating to the current v2.2 release using the configuration cable and tool.

Registers (48)

47 read / 6 write

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