aiophoenixcontactcharx 0.1.3

Async Python library for Phoenix Contact CHARX SEC EV charging controllers via Modbus/TCP

aiophoenixcontactcharx

Async Python library for Phoenix Contact CHARX SEC EV AC charging controllers (firmware 1.9.0+).

Communicates over Modbus/TCP (port 502). Supports the full CHARX SEC-3xxx family (SEC-3000, SEC-3050, SEC-3100, SEC-3150) with up to 12 charging points per controller group.

Installation

pip install aiophoenixcontactcharx

Requires Python 3.11+ and pymodbus ≥ 3.6.

Development

python3 -m venv .venv
source .venv/bin/activate
pip install -e ".[dev]"
pytest tests/

Quick start

import asyncio
from aiophoenixcontactcharx import CharxClient

async def main():
    async with CharxClient("192.168.1.100") as client:
        data = await client.fetch_data(num_charging_points=1)

        info = data.device_info
        print(f"Device: {info.designation} — SW {info.software_version}")
        print(f"IP ETH0: {info.ip_eth0}")
        print(f"Group power: {info.group_active_power_w:.1f} W")

        cp = data.charging_points[0]
        print(f"CP1 status: {cp.status.vehicle_status}")
        print(f"CP1 power:  {cp.status.active_power_w:.1f} W")
        print(f"CP1 energy: {cp.status.energy_active_kwh:.3f} kWh")

asyncio.run(main())

Writing control values

async with CharxClient("192.168.1.100") as client:
    # Charging point must be in Modbus release mode (configured in WBM)
    await client.set_charging_release(charging_point=1, enabled=True)
    await client.set_max_current(charging_point=1, current_a=11)
    await client.set_availability(charging_point=1, available=True)

    # Load management
    await client.set_dynamic_max_current(current_a=32)

Register map

See aiophoenixcontactcharx/registers.py for all addresses. Full documentation is in the Phoenix Contact manual UM EN CHARX SEC, Revision 08, Appendix B3 (p. 167–174).

Modbus prerequisites

Before the client can read or write data:

1. Enable the Modbus server in WBM → System Control → Status.
2. Open TCP port 502 in WBM → Network → Port Sharing.
3. Set the charging point release mode to Modbus (WBM → Charging Stations → Charge Point → Configuration → Release Mode) if you want to use set_charging_release() or set_availability().

Supported CHARX models

Model	Modbus/TCP
CHARX SEC-3000	✓
CHARX SEC-3050	✓
CHARX SEC-3100	✓
CHARX SEC-3150	✓

The CHARX SEC-1000 has no Ethernet and must be attached to a SEC-3xxx as a backplane extension. Its data is accessible via the SEC-3xxx Modbus interface at the corresponding charging point registers.

License

MIT