Siemens SICHARGE D Operating Instructions Manual page 61

Table 3-14 Firmware management messages
Message
GetDiagnostics
DiagnosticsStatusNotifica­
tion
Table 3-15 Reservation messages
Message
CancelReservation
ReserveNow
Other functions may be added with updates
Tariff information
The OCPP & California Pricing Requirements
(https://www.openchargealliance.org/uploads/files/OCPP-California-Pricing-Requirements.pdf)
specify that the running and final costs of a charging process generally need to be calculated
on the OCPP backend side. The charging station only shows the transferred information and
cannot calculate the costs itself.
The reason for this is the multitude of scenarios which may occur in connection with the
billing of a charging process. If the operator of the charging station and the eMobility Service
Provider (eMSP) are different parties, for example, the price for the end user is already
different to the price the operator pays to the eMSP. Different pricing models can be agreed
between these two parties. The charging station cannot access this data, however.
OCPP 1.6 does not offer any functions to configure and transmit the cost and tariff
information.
Apart from different pricing models between the eMSP and the charging station operator,
there may also be different pricing models between operator and end user. For this purpose,
the SICHARGE D also offers the option of displaying different tariffs for different end users in
addition to the OCPP & California Pricing Requirements. User-defined messages allow the
operator to decide which of these options to display.
• No tariff
• Standard tariff
• A user-defined tariff, e.g. after authentication by RFID or PIN
The tariff information can be stored and active, even if no tariff is displayed.
If no tariff is to be displayed, the charging process starts directly after successful
authentication. However, if a tariff is displayed, the user waits for confirmation or the
payment process is aborted after 30 seconds of inactivity.
Additional details can be found in the document with article no. 8EM5907-0AA00-7AA4
"Credit Card Payment for SICHARGE D
(https://support.industry.siemens.com/cs/us/en/view/109814747)".
SICHARGE D
Operating Instructions, 11/2023, A5E50556539-AG
Function
Request diagnostics data
Status of diagnostics data transfer
Function
Delete reservation of a charging port
Reserve charging port
Description
3.16 OCPP backend
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