User's Manual

User Manual VC-EVCC

 Communication via vehicle coupler (Control Pilot State B2)

Caution

The VC-EVCC is intended to be used with network management. Therefore, the CAN

message “NM_CGW” must be sent by the vehicle in order to ensure full functionality.

The recommend cycle time is 100 ms. The value of the included signal

“WakeupRsn_CGW” is not relevant and can be determined by the user.

Note

Connecting clamp 30 causes a wakeup of the VC-EVCC. After startup the VC-EVCC

stays always awake for 60 seconds.

5.1.1 CAN Message Cycle Times and Bus Load

The database (*.dbc-file) of the J1939 CAN includes detailed information about all messages

and signals. The message cycle times are included in the tab “Attributes”. In general, there

are two different message cycle times “GenMsgCycleTime” and “GenMsgCycleTimeFast”.

 GenMsgCycleTime contains the message cycle time which is used for normal

operation

 GenMsgCycleTimeFast contains a decreased message cycle time for certain CAN

messages and is only used during an active charging event. The message cycle time

switches from GenMsgCycleTime to GenMsgCycleTimeFast once a signal within the

corresponding CAN message changes its value.

In order to reduce the bus load, the VC-EVCC provides configurable message cycle times

for certain CAN messages. CAN message cycle times can be increased or set to “0ms” to