What should I do if a charging station or Smart Charging Network loses the connection to an external energy meter or EMS (Modbus TCP_IP)?
This troubleshooting guide will help you in case a charger or Smart Charging Network loses the connection to an external energy meter.
If the connection to a smart energy meter or EMS over Modbus TCP/IP is lost, a charging station or SCN will fall back to the set TotalSafeCurrent for Active Load Balancing.
The ACE Service Installer shows the communication status over Modbus TCP/IP under the Live monitoring tab under States as well as the obtained values of the smart energy meter under Currents.
If these are all 0 A, there is a communication loss. If this occurs during installation, please check the following:
- Is the cable between smart energy meter and charging station in a good condition?
You may want to use an Ethernet cable tester to check the condition of your cable. Or test the LAN by pinging the charging stations via the CMD console on the computer.
- Is the smart energy meter still working correctly? Refer to the documentation of the device to troubleshoot.
- Is the smart energy meter in the same IP range and subnet as the charging station?
Please note that you may need to reboot the charging station after changing the IP address of the charging station.
Please make sure your laptop is in the same range as well, otherwise you won't be able to see the charger in the ACE Service Installer.
You might need to disable and enable the network adapter in your laptop as well to make changed settings effective.
- Can the charging station obtain the data from the smart energy meter?
The network must not block the data communication (over port 502).
- Within an SCN, only one charging station can be connected to the smart energy meter over Modbus TCP/IP.
Please, make sure only one of the charging stations has the Active Loadbalancing option activated and is configured to connect to the smart energy meter.
If the communication loss occurs after it has functioned properly before with the setup, the physical connection in the cable or connector might have broken or the network's configuration might have changed.