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Operating Instructions 10/2020 2010045v10
Endpoint type
• Server: The charging station acts as a Modbus/TCP server. Holding registers are used. If query
cycles of a client are detected that are too fast, a RESET of the master functionality is carried out.
The cycle must be >= 1 second. Only one client is accepted at a time. The data may only be
retrieved as a whole.
• Client: The charging station acts as a Modbus/TCP client. The client uses Modbus functions 03 for
reading holding registers and 16 for writing holding registers. The data is always read/written in its
entirety. This is the preferred variant, as ideally no further firewall and routing settings need to be
made.
Partner IP address
• "Charging station as server": This IP is used if "Accept only defined partner IP" is activated. (Access
protection)
• "Charging station as client": This IP specifies the Modbus/TCP server. This must be accessible in the
subnet.
Port
• "Charging station as server": Requests are responded to on this port.
• "Charging station as client": Requests are made to this port.
Allowed ports: 502-510
Timeout
• "Charging station as server": If no data traffic is detected within this time, the communication is
considered interrupted. A RESET of the server functionality is carried out. If data has been received
correctly once, it will continue to be used.
• "Charging station as client": If no request telegrams can be successfully sent for this time, the
communication is considered interrupted. A RESET of the client functionality is carried out. If data
has been received correctly once, it will continue to be used. The timeout must be greater than the
polling interval.
Adjustable values: 3-43200 seconds (12h)
Accept only defined partner IP
If the charging station works as a server, you can activate this function to filter the requests. If this function is
activated, only requests from the partner IP are accepted (recommended setting). If the function is
deactivated, requests from any IP are accepted.
Client Poll Interval
Use this cycle to initiate write and read requests. The poll interval must be greater than or equal to one
second and less than the timeout value.
Adjustable values 1-43199 seconds (1s-12h)
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