5. Communication

5.1. CAN

foxBMS 2 supports communication with other high level devices (e.g., the VCU) through CAN.

5.1.1. DBC File

These files describe the CAN interface used by foxBMS 2. The .dbc-file has been created using PCAN Symbol Editor Version 6.5.2 from symbol file Version 6.0.

The .dbc-file and .sym-file are located in tools/dbc.

5.1.1.1. Supported CAN Messages

5.1.2. Insulation Measurement Device

ID	Name	Comment	Implementation file
022h	IMD_BenderIso165c_Request		can_cbs_tx_imd_bender-iso165c-request.c
023h	IMD_BenderIso165c_Response		can_cbs_rx_imd_bender-iso165c-response.c
037h	IMD_BenderIso165c_Info		can_cbs_rx_imd_bender-iso165c-info.c

5.1.3. Crash Dump

ID	Name	Comment	Implementation file
0FFh	f_CrashDump	Fatal error information	can_cbs_tx_f_crash-dump.c

5.1.4. BMS Status

ID	Name	Comment	Implementation file
210h	f_BmsStateRequest	Requests specific BMS behavior and gives the BMS required information from the higher-level control unit	can_cbs_rx_f_bms-state-request.c
220h	f_BmsState	Message contains general BMS state information	can_cbs_tx_f_bms-state.c
221h	f_BmsStateDetails	Details on flags transmitted by the ‘BmsState’ message	can_cbs_tx_f_bms-state-details.c
222h	f_BmsFatalError	Message contains the fatal error code	can_cbs_tx_f_fatal-error.c

5.1.5. State Machine Information

ID	Name	Comment	Implementation file
219h	f_SystemState	Message contains the state of our System state machine	can_cbs_tx_f_sys-state.c

5.1.6. Pack Information

ID	Name	Comment	Implementation file
230h	f_PackMinMaxCellTemperature		can_cbs_tx_f_pack-minimum-maximum-values.c
231h	f_PackMinMaxCellVoltage		can_cbs_tx_f_pack-minimum-maximum-values.c
232h	f_PackLimits	Electrical limit information	can_cbs_tx_f_pack-limits.c
233h	f_PackValuesP0		can_cbs_tx_f_pack-values-p0.c
234h	f_PackValuesP1		can_cbs_tx_f_pack-values-p1.c
235h	f_PackStateEstimation		can_cbs_tx_f_pack-state-estimation.c

5.1.7. String Information

ID	Name	Comment	Implementation file
240h	f_StringState	Message contains string related error and warning flags	can_cbs_tx_f_string-state.c
241h	f_StringMinMaxCellTemperature	Message contains minimum and maximum cell temperature values and their indices of respective string	can_cbs_tx_f_string-minimum-maximum-values.c
242h	f_StringMinMaxCellVoltage	Message contains minimum and maximum cell voltage values and their indices of respective string	can_cbs_tx_f_string-minimum-maximum-values.c
243h	f_StringValuesP0	Message contains string voltage, current and power	can_cbs_tx_f_string-values-p0.c
244h	f_StringValuesP1	Message contains energy counting value	can_cbs_tx_f_string-values-p1.c
245h	f_StringStateEstimation	Message contains SOC, SOE and SOH state estimations	can_cbs_tx_f_string-state-estimation.c

5.1.8. Cell Information

ID	Name	Comment	Implementation file
250h	f_CellVoltages	Cell voltage measurement data	can_cbs_tx_f_cell-voltages.c
260h	f_CellTemperatures	Cell temperature measurement data	can_cbs_tx_f_cell-temperatures.c
270h	AFE_CellVoltages	Cell voltage measurement data	can_cbs_rx_afe_cell-voltages.c
280h	AFE_CellTemperatures	Cell temperature measurement data	can_cbs_rx_afe_cell-temperatures.c

5.1.9. Debug

ID	Name	Comment	Implementation file
300h	f_Debug	Reserved - for debug/development purpose only	can_cbs_rx_f_debug.c
301h	f_DebugResponse	Responses to the ‘Debug’ message	can_cbs_tx_f_debug-response.c
302h	f_DebugUnsupportedMultiplexerVal		can_cbs_tx_f_debug-unsupported-multiplexer-values.c
303h	f_DebugBuildConfiguration	Contains the build configuration	can_cbs_tx_f_debug-build-configuration.c
304h	f_DebugIdentifyHardware	Contains the hardware identifications	can_cbs_tx_f_debug-identify-hardware.c

5.1.10. Current Sensor

ID	Name	Comment	Implementation file
3C2h	CS_LemCab500String0	LEM Current Sensor	can_cbs_rx_cs_lem-cab500.c
521h	CS_IsabellenhuetteIvtString0Curr	Current sensor string 0: current	can_cbs_rx_cs_isabellenhuette-ivt-s.c
522h	CS_IsabellenhuetteIvtString0V1	Current sensor string 0: voltage 1	can_cbs_rx_cs_isabellenhuette-ivt-s.c
523h	CS_IsabellenhuetteIvtString0V2	Current sensor string 0: voltage 2	can_cbs_rx_cs_isabellenhuette-ivt-s.c
524h	CS_IsabellenhuetteIvtString0V3	Current sensor string 0: voltage 3	can_cbs_rx_cs_isabellenhuette-ivt-s.c
525h	CS_IsabellenhuetteIvtString0Temp	Current sensor string 0: temperature	can_cbs_rx_cs_isabellenhuette-ivt-s.c
526h	CS_IsabellenhuetteIvtString0Pwr	Current sensor string 0: power	can_cbs_rx_cs_isabellenhuette-ivt-s.c
527h	CS_IsabellenhuetteIvtString0Cc	Current sensor string 0: coulomb counting	can_cbs_rx_cs_isabellenhuette-ivt-s.c
528h	CS_IsabellenhuetteIvtString0Ec	Current sensor string 0: energy counting	can_cbs_rx_cs_isabellenhuette-ivt-s.c

5.1.11. Aerosol Sensor

ID	Name	Comment	Implementation file
3C4h	AS_HoneywellBas6cX00		can_cbs_rx_as_honeywell-bas6c-x00.c

5.2. Ethernet

Additionally to to CAN communication an ethernet communication interface is provided. Currently plain TCP/IP is supported for user defined application tasks. These tasks can be placed in ethernet.c. As an example and for testing purposes an echo server is implemented there. More details can be found in Ethernet Module.