User's Manual

User Manual VC-EVCC

5.1.2.2 VCVCCU_ChargeToVehicle

The CAN message VCVCCU_ChargeToVehicle contains the following signals which are

used for E2E protection.

 E2E_Cnt_ChargeToVehicle (Counter): This signal is used to ensure the data is received

periodically. The VC-EVCC increments the value of this signal for every message cycle

until it reaches 0x0E after which it is reset to 0x0. Then incrementing will be started

again.

 E2E_CRC_ChargeToVehicle: This signal is used to ensure the data validity.

 E2E_State_ChargeFromVehicle: This signal shows the result of the E2E validation of

the CAN message VCVCCU_ChargeFromVehicle.

The VC-EVCC calculates the signal value of E2E_CRC_ChargeToVehicle for the CAN

message VCVCCU_ChargeToVehicle according to E2E Profile 1.

 E2E_CRC_ChargeToVehicle = CRC8 over Data ID (0xFF17) and the seven bytes of

the CAN message (Byte 0 to Byte 6) including the empty area (set to 0xFF) but

excluding the CRC byte (Byte 7) itself.

5.1.2.3 Fault Memory

The VC-EVCC provides an error detection for E2E protection. Therefore, the following

diagnostic trouble code is used to indicate a fault related to the E2E protection.

 VCVCCU_ChargeFromVehicle E2E Fault (DTC 0x20E0EA)