7. Communicating with foxBMS

7.1. Communicating over CAN

The table CAN Messages shows the CAN messages sent and received by the BMS with their respective names and IDs, the direction and a short comment.

The table CAN RX Signals gives the CAN signals sent and received in these messages.

To add or change a signal it must be refered to the software FAQ: How to manually add CAN entries (transmit and receive) and to change the transmit time period?.

Note

18 cell voltages, 12 cell temperatures and 8 modules are configured in the default CAN configuration of the foxBMS Software.

If less then 8 modules, 18 cell voltages or 12 temperature sensors are configured in the software (e.g., in batterysystem_cfg.h), default values are transmitted on these messages/signals. These values from the unused CAN messages must simply be ignored.

In case it is really wanted to not transmit these values, the configuration of the CAN module must be changed as shown in the software FAQ in How to adapt the CAN module when less or more than 8 battery modules are used? and in How to adapt the CAN module when less than 18 battery cells or 12 temperature sensors per module are used?. The configuration must also be changed if more than 8 modules, 18 cell voltages or 12 temperature sensors are used.

7.1.1. CAN Messages

Message names in the DBC file can vary from the following tables in order to be compliant with the 32 character limit of DBC files.

RX Messages:

Message Name

Message ID

DLC

Direction

Description

CAN0_Software_Reset

0x95

8

RX

Perform software reset

CAN0_Debug_Message

0x100

8

RX

Debug message

CAN0_State_Request

0x120

8

RX

State request

CAN0_IVT_Current

0x35C/0x521

6

RX

Current Sensing Current Value

CAN0_IVT_Voltage_1

0x35D/0x522

6

RX

Current Sensing Voltage 1

CAN0_IVT_Voltage_2

0x35E/0x523

6

RX

Current Sensing Voltage 2

CAN0_IVT_Voltage_3

0x35F/0x524

6

RX

Current Sensing Voltage 3

CAN0_IVT_Temperature

0x525

6

RX

Current Sensing Temperature

CAN0_IVT_Power

0x526

6

RX

Current Sensing Power

CAN0_IVT_CoulombCount

0x527

6

RX

Current Sensing Coulomb Counting Value

CAN0_IVT_EnergyCount

0x528

6

RX

Current Sensing Energy Counting Value

CAN0_GetReleaseVersion

0x777

8

RX

Request software version

TX Messages:

Message Name

Message ID

DLC

Direction

Description

CAN0_MSG_Boot

0x101

8

TX

BMS booting successful

CAN0_MSG_SystemState_0

0x110

8

TX

BMS system state 0

CAN0_MSG_SystemState_1

0x111

8

TX

BMS system state 1

CAN0_MSG_SystemState_2

0x112

8

TX

BMS system state 2

CAN0_MSG_SlaveState_0

0x115

8

TX

BMS slave state 0

CAN0_MSG_SlaveState_1

0x116

8

TX

BMS slave state 1

CAN0_RecOperatingCurrent

0x130

8

TX

Recommended operating current

CAN0_SOP

0x131

8

TX

State-of-power

CAN0_SOC

0x140

8

TX

State-of-charge

CAN0_SOH

0x150

8

TX

State-of-health

CAN0_SOE

0x160

8

TX

State-of-energy

CAN0_MinMaxCellVoltages

0x170

8

TX

Cell voltages Max Min Mean

CAN0_SOV

0x171

8

TX

State-of-voltage

CAN0_MinMaxCellTemperatures

0x180

8

TX

Cell temperatures Max Min Mean

CAN0_Tempering

0x190

8

TX

Cooling/Heating

CAN0_Insulation

0x1A0

8

TX

Insulation

CAN0_MovAveragePower_0

0x1D0

8

TX

Moving average power 0

CAN0_MovAveragePower_1

0x1D1

8

TX

Moving average power 1

CAN0_MovAveragePower_2

0x1D2

8

TX

Moving average power 2

CAN0_MovAverageCurrent_0

0x1E0

8

TX

Moving average current 0

CAN0_MovAverageCurrent_1

0x1E1

8

TX

Moving average current 1

CAN0_MovAverageCurrent_2

0x1E2

8

TX

Moving average current 2

CAN0_PackVoltage

0x1F0

8

TX

Battery pack voltage

CAN0_Cell_voltage_M0_0

0x200

8

TX

Cell voltages module 0 cell 0 1 2

CAN0_Cell_voltage_M0_1

0x201

8

TX

Cell voltages module 0 cell 3 4 5

CAN0_Cell_voltage_M0_2

0x202

8

TX

Cell voltages module 0 cell 6 7 8

CAN0_Cell_voltage_M0_3

0x203

8

TX

Cell voltages module 0 cell 9 10 11

CAN0_Cell_voltage_M0_4

0x204

8

TX

Cell voltages module 0 cell 12 13 14

CAN0_Cell_voltage_M0_5

0x205

8

TX

Cell voltages module 0 cell 15 16 17

CAN0_Cell_temperature_M0_0

0x210

8

TX

Cell temperatures module 0 - 0 1 2

CAN0_Cell_temperature_M0_1

0x211

8

TX

Cell temperatures module 0 - 3 4 5

CAN0_Cell_temperature_M0_2

0x212

8

TX

Cell temperatures module 0 - 6 7 8

CAN0_Cell_temperature_M0_3

0x213

8

TX

Cell temperatures module 0 - 9 10 11

CAN0_Cell_voltage_M1_0

0x220

8

TX

Cell voltages module 1 cell 0 1 2

CAN0_Cell_voltage_M1_1

0x221

8

TX

Cell voltages module 1 cell 3 4 5

CAN0_Cell_voltage_M1_2

0x222

8

TX

Cell voltages module 1 cell 6 7 8

CAN0_Cell_voltage_M1_3

0x223

8

TX

Cell voltages module 1 cell 9 10 11

CAN0_Cell_voltage_M1_4

0x224

8

TX

Cell voltages module 1 cell 12 13 14

CAN0_Cell_voltage_M1_5

0x225

8

TX

Cell voltages module 1 cell 15 16 17

CAN0_Cell_temperature_M1_0

0x230

8

TX

Cell temperatures module 1 - 0 1 2

CAN0_Cell_temperature_M1_1

0x231

8

TX

Cell temperatures module 1 - 3 4 5

CAN0_Cell_temperature_M1_2

0x232

8

TX

Cell temperatures module 1 - 6 7 8

CAN0_Cell_temperature_M1_3

0x233

8

TX

Cell temperatures module 1 - 9 10 11

CAN0_Cell_voltage_M2_0

0x240

8

TX

Cell voltages module 2 cell 0 1 2

CAN0_Cell_voltage_M2_1

0x241

8

TX

Cell voltages module 2 cell 3 4 5

CAN0_Cell_voltage_M2_2

0x242

8

TX

Cell voltages module 2 cell 6 7 8

CAN0_Cell_voltage_M2_3

0x243

8

TX

Cell voltages module 2 cell 9 10 11

CAN0_Cell_voltage_M2_4

0x244

8

TX

Cell voltages module 2 cell 12 13 14

CAN0_Cell_voltage_M2_5

0x245

8

TX

Cell voltages module 2 cell 15 16 17

CAN0_Cell_temperature_M2_0

0x250

8

TX

Cell temperatures module 2 - 0 1 2

CAN0_Cell_temperature_M2_1

0x251

8

TX

Cell temperatures module 2 - 3 4 5

CAN0_Cell_temperature_M2_2

0x252

8

TX

Cell temperatures module 2 - 6 7 8

CAN0_Cell_temperature_M2_3

0x253

8

TX

Cell temperatures module 2 - 9 10 11

CAN0_Cell_voltage_M3_0

0x260

8

TX

Cell voltages module 3 cell 0 1 2

CAN0_Cell_voltage_M3_1

0x261

8

TX

Cell voltages module 3 cell 3 4 5

CAN0_Cell_voltage_M3_2

0x262

8

TX

Cell voltages module 3 cell 6 7 8

CAN0_Cell_voltage_M3_3

0x263

8

TX

Cell voltages module 3 cell 9 10 11

CAN0_Cell_voltage_M3_4

0x264

8

TX

Cell voltages module 3 cell 12 13 14

CAN0_Cell_voltage_M3_5

0x265

8

TX

Cell voltages module 3 cell 15 16 17

CAN0_Cell_temperature_M3_0

0x270

8

TX

Cell temperatures module 3 - 0 1 2

CAN0_Cell_temperature_M3_1

0x271

8

TX

Cell temperatures module 3 - 3 4 5

CAN0_Cell_temperature_M3_2

0x272

8

TX

Cell temperatures module 3 - 6 7 8

CAN0_Cell_temperature_M3_3

0x273

8

TX

Cell temperatures module 3 - 9 10 11

CAN0_Cell_voltage_M4_0

0x280

8

TX

Cell voltages module 4 cell 0 1 2

CAN0_Cell_voltage_M4_1

0x281

8

TX

Cell voltages module 4 cell 3 4 5

CAN0_Cell_voltage_M4_2

0x282

8

TX

Cell voltages module 4 cell 6 7 8

CAN0_Cell_voltage_M4_3

0x283

8

TX

Cell voltages module 4 cell 9 10 11

CAN0_Cell_voltage_M4_4

0x284

8

TX

Cell voltages module 4 cell 12 13 14

CAN0_Cell_voltage_M4_5

0x285

8

TX

Cell voltages module 4 cell 15 16 17

CAN0_Cell_temperature_M4_0

0x290

8

TX

Cell temperatures module 4 - 0 1 2

CAN0_Cell_temperature_M4_1

0x291

8

TX

Cell temperatures module 4 - 3 4 5

CAN0_Cell_temperature_M4_2

0x292

8

TX

Cell temperatures module 4 - 6 7 8

CAN0_Cell_temperature_M4_3

0x293

8

TX

Cell temperatures module 4 - 9 10 11

CAN0_Cell_voltage_M5_0

0x2A0

8

TX

Cell voltages module 5 cell 0 1 2

CAN0_Cell_voltage_M5_1

0x2A1

8

TX

Cell voltages module 5 cell 3 4 5

CAN0_Cell_voltage_M5_2

0x2A2

8

TX

Cell voltages module 5 cell 6 7 8

CAN0_Cell_voltage_M5_3

0x2A3

8

TX

Cell voltages module 5 cell 9 10 11

CAN0_Cell_voltage_M5_4

0x2A4

8

TX

Cell voltages module 5 cell 12 13 14

CAN0_Cell_voltage_M5_5

0x2A5

8

TX

Cell voltages module 5 cell 15 16 17

CAN0_Cell_temperature_M5_0

0x2B0

8

TX

Cell temperatures module 5 - 0 1 2

CAN0_Cell_temperature_M5_1

0x2B1

8

TX

Cell temperatures module 5 - 3 4 5

CAN0_Cell_temperature_M5_2

0x2B2

8

TX

Cell temperatures module 5 - 6 7 8

CAN0_Cell_temperature_M5_3

0x2B3

8

TX

Cell temperatures module 5 - 9 10 11

CAN0_Cell_voltage_M6_0

0x2C0

8

TX

Cell voltages module 6 cell 0 1 2

CAN0_Cell_voltage_M6_1

0x2C1

8

TX

Cell voltages module 6 cell 3 4 5

CAN0_Cell_voltage_M6_2

0x2C2

8

TX

Cell voltages module 6 cell 6 7 8

CAN0_Cell_voltage_M6_3

0x2C3

8

TX

Cell voltages module 6 cell 9 10 11

CAN0_Cell_voltage_M6_4

0x2C4

8

TX

Cell voltages module 6 cell 12 13 14

CAN0_Cell_voltage_M6_5

0x2C5

8

TX

Cell voltages module 6 cell 15 16 17

CAN0_Cell_temperature_M6_0

0x2D0

8

TX

Cell temperatures module 6 - 0 1 2

CAN0_Cell_temperature_M6_1

0x2D1

8

TX

Cell temperatures module 6 - 3 4 5

CAN0_Cell_temperature_M6_2

0x2D2

8

TX

Cell temperatures module 6 - 6 7 8

CAN0_Cell_temperature_M6_3

0x2D3

8

TX

Cell temperatures module 6 - 9 10 11

CAN0_Cell_voltage_M7_0

0x2E0

8

TX

Cell voltages module 7 cell 0 1 2

CAN0_Cell_voltage_M7_1

0x2E1

8

TX

Cell voltages module 7 cell 3 4 5

CAN0_Cell_voltage_M7_2

0x2E2

8

TX

Cell voltages module 7 cell 6 7 8

CAN0_Cell_voltage_M7_3

0x2E3

8

TX

Cell voltages module 7 cell 9 10 11

CAN0_Cell_voltage_M7_4

0x2E4

8

TX

Cell voltages module 7 cell 12 13 14

CAN0_Cell_voltage_M7_5

0x2E5

8

TX

Cell voltages module 7 cell 15 16 17

CAN0_Cell_temperature_M7_0

0x2F0

8

TX

Cell temperatures module 7 - 0 1 2

CAN0_Cell_temperature_M7_1

0x2F1

8

TX

Cell temperatures module 7 - 3 4 5

CAN0_Cell_temperature_M7_2

0x2F2

8

TX

Cell temperatures module 7 - 6 7 8

CAN0_Cell_temperature_M7_3

0x2F3

8

TX

Cell temperatures module 7 - 9 10 11

CAN0_MSG_ISENS_TRIG

0x35B

8

TX

Trigger for CurrentSensor

7.1.2. CAN RX Signals

Message: CAN0_Software_Reset

Message ID: 0x95

DLC: 8

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

Unit

Byteorder

When this message is received, a software reset is performed.


Message: CAN0_Debug_Message

Message ID: 0x100

DLC: 8

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

Unit

Byteorder

CAN0_SIG_DEBUG_Data

0

64

0.0

0xFFFFFFFF

1.0

0.0

none

Intel

This message contains only one single signal. The debug data is interpreted by the embedded software differently depending on its actual databits. In the software FAQ (How to simply trigger events via CAN?), further details are given on the handling of debug messages.


Message: CAN0_State_Request

Message ID: 0x120

DLC: 8

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

Unit

Byteorder

CAN0_SIG_ReceiveStateRequest

8

8

0.0

255

1.0

0.0

none

Intel

In the messages described in the previous table, the signal CAN0_SIG_ReceiveStateRequest is used to change the state of the foxBMS Master Unit. This is one of the most important signals: it allows initiating the procedure to close the power contactors. Possible request numbers in default configuration are 3 (Normal state), 4 (Charge state) and 8 (Standby state), but can be configured (0 is No Request). More details can be found in the documentation of the module BMS.

A state request has to be sent every 100ms, otherwise the BMS enters into an error state. The requests must come in the window 95-105ms to be valid.


Message: CAN0_MSG_IVT_Current

Message ID: 0x35C/0x521

DLC: 6

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

Unit

Byteorder

CAN0_SIG_IVT_Current_MuxID

0

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_IVT_Current_Status

8

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_IVT_Current_Measurement

16

32

-2147483648

2147483647

1.0

0.0

mA

Intel

CAN0_IVT_Current_MuxID indicates the measurement type and CAN0_IVT_Current_Status indicates status values and counters of the current sensor measurement. For details the datasheet of the current sensor must be consulted. CAN0_IVT_Current_Measurement is the current value measured by the sensor. It is a 32 bit signed value with 1mA resolution. It must be noted that resolution in CAN transmission is not the same as the measurement accuracy.


Message: CAN0_MSG_IVT_Voltage_1

Message ID: 0x35D/0x522

DLC: 6

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

unit

Byteorder

CAN0_SIG_IVT_Voltage_1_MuxID

0

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_IVT_Voltage_1_Status

8

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_IVT_Voltage_1_Measurement

16

32

0.0

4294967295

1.0

0.0

mV

Intel

CAN0_IVT_Voltage_1_MuxID indicates the measurement type and CAN0_IVT_Voltage_1_Status indicates status values and counters of the current sensor measurement. For details the datasheet of the current sensor must be consulted. CAN0_IVT_Voltage_1_Measurement is the voltage value measured by the sensor at the voltage input channel 1. It is a 32 bit unsigned value with 1mV resolution. It must be noted that resolution in CAN transmission is not the same as the measurement accuracy.


Message: CAN0_MSG_IVT_Voltage_2

Message ID: 0x35E/0x523

DLC: 6

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

unit

Byteorder

CAN0_SIG_IVT_Voltage_2_MuxID

0

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_IVT_Voltage_2_Status

8

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_IVT_Voltage_2_Measurement

16

32

0.0

4294967295

1.0

0.0

mV

Intel

CAN0_IVT_Voltage_2_MuxID indicates the measurement type and CAN0_IVT_Voltage_2_Status indicates status values and counters of the current sensor measurement. For details the datasheet of the current sensor must be consulted. CAN0_IVT_Voltage_2_Measurement is the voltage value measured by the sensor at the voltage input channel 2. It is a 32 bit unsigned value with 1mV resolution. It must be noted that resolution in CAN transmission is not the same as the measurement accuracy.


Message: CAN0_MSG_IVT_Voltage_3

Message ID: 0x35F/0x524

DLC: 6

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

Unit

Byteorder

CAN0_SIG_IVT_Voltage_3_MuxID

0

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_IVT_Voltage_3_Status

8

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_IVT_Voltage_3_Measurement

16

32

0.0

4294967295

1.0

0.0

mV

Intel

CAN0_IVT_Voltage_3_MuxID indicates the measurement type and CAN0_IVT_Voltage_3_Status indicates status values and counters of the current sensor measurement. For details the datasheet of the current sensor must be consulted. CAN0_IVT_Voltage_3_Measurement is the voltage value measured by the sensor at the voltage input channel 3. It is a 32 bit unsigned value with 1mV resolution. It must be noted that resolution in CAN transmission is not the same as the measurement accuracy.


Message: CAN0_MSG_IVT_Temperature

Message ID: 0x525

DLC: 6

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

Unit

Byteorder

CAN0_SIG_IVT_Temperature_MuxID

0

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_IVT_Temperature_Status

8

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_IVT_Temperature_Measurement

16

32

-2147483648

2147483647

1.0

0.0

0.1°C

Intel

CAN0_IVT_Temperature_MuxID indicates the measurement type and CAN0_IVT_Temperature_Status indicates status values and counters of the current sensor measurement. For details the datasheet of the current sensor must be consulted. CAN0_IVT_Temperature_Measurement is the temperature value measured by the sensor. It is a 32 bit signed value with 0.1°C resolution. It must be noted that resolution in CAN transmission is not the same as the measurement accuracy.


Message: CAN0_MSG_IVT_Power

Message ID: 0x526

DLC: 6

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

Unit

Byteorder

CAN0_SIG_IVT_Power_MuxID

0

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_IVT_Power_Status

8

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_IVT_Power_Measurement

16

32

-2147483648

2147483647

1.0

0.0

W

Intel

CAN0_IVT_Power_MuxID indicates the measurement type and CAN0_IVT_Power_Status indicates status values and counters of the current sensor measurement. For details the datasheet of the current sensor must be consulted. CAN_IVT0_Power_Measurement is the power value measured by the sensor (referring to current and voltage U1). It is a 32 bit signed value with 1W resolution. It must be noted that resolution in CAN transmission is not the same as the measurement accuracy.


Message: CAN0_MSG_IVT_CoulombCount

Message ID: 0x527

DLC: 6

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

Unit

Byteorder

CAN0_SIG_IVT_CC_MuxID

0

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_IVT_CC_Status

8

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_IVT_CC_Measurement

16

32

-2147483648

2147483647

1.0

0.0

As

Intel

CAN0_IVT_CoulombCount_MuxID indicates the measurement type and CAN0_IVT_CoulombCount_Status indicates status values and counters of the current sensor measurement. For details the datasheet of the current sensor must be consulted. CAN0_IVT_CoulombCount_Measurement is the current counted by the sensor. It is a 32 bit signed value with 1As resolution. It must be noted that resolution in CAN transmission is not the same as the measurement accuracy.


Message: CAN0_MSG_IVT_EnergyCount

Message ID: 0x528

DLC: 6

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

Unit

Byteorder

CAN0_SIG_IVT_EC_MuxID

0

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_IVT_EC_Status

8

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_IVT_EC_Measurement

16

32

-2147483648

2147483647

1.0

0.0

Wh

Intel

CAN0_IVT_EnergyCount_MuxID indicates the measurement type and CAN_IVT0_EnergyCount_Status indicates status values and counters of the current sensor measurement. For details the datasheet of the current sensor must be consulted. CAN0_IVT_EnergyCount_Measurement is the energy counted by the sensor (referring to current and voltage U1). It is a 32 bit signed value with 1Wh resolution. It must be noted that resolution in CAN transmission is not the same as the measurement accuracy.


Message: CAN0_MSG_GetReleaseVersion

Message ID: 0x777

DLC: 8

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

Unit

Byteorder

CAN0_SIG_GetReleaseVersion

0

64

0.0

0

1.0

0.0

none

Intel

When message CAN0_MSG_GetReleaseVersion is received, CAN message CAN0_MSG_BOOT is transmitted as response message.


7.1.3. CAN TX Signals

Message: CAN0_MSG_BOOT

Message ID: 0x101

DLC: 8

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

Unit

Byteorder

CAN0_SIG_VersionNumberMajor

0

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_VersionNumberMinor

8

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_VersionNumberBugfix

16

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_Checksum

32

32

0.0

4294967295

1.0

0.0

none

Intel

CAN0_SIG_VersionNumberMajor, CAN0_SIG_VersionNumberMinor and signal CAN0_SIG_VersionNumberMinor add up to the current flashed SW-version. The latest Releaseversion is 1.6.2. CAN0_SIG_Checksum holds the calculated CRC32 checksum of the flashed software. This message is transmitted once after startup or can be requested via CAN.


Message: CAN0_MSG_SystemState_0

Message ID: 0x110

DLC: 8

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

Unit

Byteorder

CAN0_SIG_GS0_general_error

0

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_GS0_current_state

8

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_GS0_error_overtemp_charge

16

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_GS0_error_undertemp_charge

24

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_GS0_error_overtemp_discharge

32

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_GS0_error_undertemp_discharge

40

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_GS0_error_overcurrent_charge

48

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_GS0_error_overcurrent_discharge

56

8

0.0

255

1.0

0.0

none

Intel

Message: CAN0_MSG_SystemState_1

Message ID: 0x111

DLC: 8

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

Unit

Byteorder

CAN0_SIG_GS1_error_overvoltage

0

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_GS1_error_undervoltage

8

3

0.0

7

1.0

0.0

none

Intel

CAN0_SIG_GS1_error_deep_discharge

11

5

0.0

31

1.0

0.0

none

Intel

CAN0_SIG_GS1_error_temperature_MCU0

16

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_GS1_error_contactor

24

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_GS1_error_selftest

32

8

for future use (not implemented yet)

CAN0_SIG_GS1_error_cantiming

40

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_GS1_current_sensor

48

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_GS1_balancing_active

56

8

0.0

255

1.0

0.0

none

Intel

Message: CAN0_MSG_SystemState_2

Message ID: 0x112

DLC: 8

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

Unit

Byteorder

CAN0_SIG_GS2_state_cont_interlock

0

16

0.0

65535

1.0

0.0

none

Intel

CAN0_SIG_GS2_error_insulation

16

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_GS2_fuse_state

24

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_GS2_lowCoinCellVolt

32

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_GS2_error_openWire

40

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_GS2_daisyChain

48

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_GS2_plausibilityCheck

56

8

0.0

255

1.0

0.0

none

Intel

The signals of the messages CAN0_MSG_SystemState_0 , CAN0_MSG_SystemState_1 and CAN0_MSG_SystemState_2 display information about the system status of the battery system.

CAN0_SIG_GS0_general_error indicates if and an error is detected from the BMS:

  • Bit[0]: maximum safety limit violated, CAN timing, current sensor or contactor error detected

  • Bit[1]: recommended safety limit violated

  • Bit[2]: maximum operating limit violated

The current state of the battery system is represented by the a bitfield in signal CAN0_SIG_GS0_current_state:

  • 0x00: Uninitialized

  • 0x03: Idle

  • 0x04: Standby

  • 0x05: Precharge (normal)

  • 0x06: Normal

  • 0x07: Precharge (charge)

  • 0x08: Charge

  • 0xF0: Error

The various error signals CAN0_SIG_GSx_error_xxxx give information about limit violations and internal errors. In general, the following bitfield is used:

  • Bit[0]: maximum safety limit violated

  • Bit[1]: recommended safety limit violated

  • Bit[2]: maximum operating limit violated

Flag CAN0_SIG_GS1_error_deep_discharge is a non-volatile flag saved in backup SRAM that indicates if a deep-discharge of a cell has been detected. This means that a power-cycle of the BMS won’t reset the flag provided the coin cell is not empty. The affected cell has to be replaced and the BMS won’t reset the flag until the corresponding CAN debug message was sent (see How to reset deep-discharge flag via CAN?).

CAN0_SIG_GS1_error_temperature_MCU0 indicates if the operating range of the MCU0 junction temperature is violated. CAN0_SIG_GS1_error_cantiming is set to 1 if the can timing is violated (see #define CHECK_CAN_TIMING for more information). CAN0_SIG_GS1_current_sensor is 1 if no current sensor is detected and otherwise 0. CAN0_SIG_GS1_error_contactor is set to 1 if contactor error is detected. This means the feedback signal of the contactor doesn’t match the controlled state. CAN0_SIG_GS1_error_cantiming occurs if no state request message is received within 100ms. This feature can be enabled/disabled (see Important Switches in Code). The signal CAN0_SIG_GS1_balancing_active is a simple flag to show if balancing is ON (1) or OFF (0). CAN0_SIG_GS2_error_insulation indicates an insulation error. CAN0_SIG_GS2_dieTempMCU indicates a violation of the primary MCU die temperature.

The status of contactors and the interlock is represented as a bitfield in BMS1_status_contactors (0: open, 1: closed):

  • Bit[0]: Plus (normal)

  • Bit[1]: Precharge (normal)

  • Bit[2]: Minus (normal)

  • Bit[3]: Plus (charge)

  • Bit[4]: Precharge (charge)

  • Bit[5]: Minus (charge)

  • Bit[6-8]: reserved for future use

  • Bit[9]: Interlock status

  • Bit[10-15]: reserved for future use

Bitfield CAN0_SIG_GS2_lowCoinCellVolt displays the coin cell status.

  • Bit[0]: Coin cell voltage low: swap battery in the near future

  • Bit[1]: Coin cell voltage critically low: swap battery as soon as possible

CAN0_SIG_GS2_error_openWire is set to 1 if an open voltage sense wire is detected. Bitfield CAN0_SIG_GS2_fuse_state indicates the fuse state (0: fuse intact, 1: fuse tripped):

  • Bit[0]: Fuse state normal path

  • Bit[1]: Fuse/Contactor state normal path

  • Bit[2]: Fuse state charge path

  • Bit[3]: Fuse/Contactor state charge path

A problem with the daisy-chain communication is indicated with bitfield CAN0_SIG_GS2_daisyChain (0: no error, 1: error)

  • Bit[0]: spi error

  • Bit[1]: ltc PEC error

  • Bit[2]: multiplexer error

Plausibility errors detected by on of the checks are indicated with bitfield CAN0_SIG_GS2_plausibilityCheck (0: no error, 1: error)

  • Bit[0]: cell voltage plausibility error

  • Bit[1]: temperature sensor plausibility error

  • Bit[2]: pack voltage plausibility error


Message: CAN_MSG_SlaveState_0

Message ID: 0x115

DLC: 8

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

Unit

Byteorder

CAN0_SIG_SS0_states

0

64

for future use (not implemented yet)

Message: CAN_MSG_SlaveState_1

Message ID: 0x116

DLC: 8

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

Unit

Byteorder

CAN0_SIG_SS1_states

0

64

for future use (not implemented yet)

This messages indicate any errors with the foxBMS Slave Units but this functionality is currently not supported.


Message: CAN0_RecOperatingCurrent

Message ID: 0x130

DLC: 8

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

Unit

Byteorder

CAN0_SIG_RecChargeCurrent

0

16

0.0

6553.5

0.1

0.0

A

Intel

CAN0_SIG_RecChargeCurrent_Peak

16

16

0.0

6553.5

0.1

0.0

A

Intel

CAN0_SIG_RecDischargeCurrent

32

16

0.0

6553.5

0.1

0.0

A

Intel

CAN0_SIG_RecDischargeCurrent_Peak

48

16

0.0

6553.5

0.1

0.0

A

Intel

The recommended current capability of the battery system is indicated by the signals of the previous table. For both discharge and charge directions, two values are stated, one for the continuous current capability and one for the peak current capability. Currently, the peak value is simply the same as the continuous value. The resolution of the values is 0.1A, which should be of sufficient granularity for most applications. It is a tradeoff that enables a range up to 6553.5A in charge and discharge direction with reasonable resolution.


Note

This feature is currently not supported!

Message: CAN0_MSG_SOP

Message ID: 0x131

DLC: 8

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

Unit

Byteorder

CAN0_SIG_MaxChargePower

0

16

0.0

6553.5

0.1

0.0

kW

Intel

CAN0_SIG_MaxChargePower_Peak

16

16

0.0

6553.5

0.1

0.0

kW

Intel

CAN0_SIG_MaxDischargePower

32

16

0.0

6553.5

0.1

0.0

kW

Intel

CAN0_SIG_MaxDischargePower_Peak

48

16

0.0

6553.5

0.1

0.0

kW

Intel

The power capability of the battery system is indicated by the signals of the previous table. For both discharge and charge directions, two values are stated, one for the continuous power capability and one for the peak power capability. Currently, the peak value is simply the same as the continuous value. The resolution of the values is 100W, which should be of sufficient granularity for most applications. It is a tradeoff that enables a range up to 6553.5kW in charge and discharge direction with reasonable resolution.

Note

This feature is currently not supported!


Message: CAN0_MSG_SOC

Message ID: 0x140

DLC: 8

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

Unit

Byteorder

CAN0_SIG_SOC_mean

0

16

0.0

100.0

0.01

0.0

%

Intel

CAN0_SIG_SOC_min

16

16

0.0

100.0

0.01

0.0

%

Intel

CAN0_SIG_SOC_max

32

16

0.0

100.0

0.01

0.0

%

Intel

CAN0_SIG_SOC_max

48

16

currently not used

Once initialized, CAN0_SIG_SOC_mean, CAN0_SIG_SOC_min, CAN0_SIG_SOC_max the values are updated via Coulomb counting. The values can be initialized either with a look-up table or by setting the values directly.


Message: CAN0_MSG_SOH

Message ID: 0x150

DLC: 8

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

Unit

Byteorder

This message is currently not backed up with information and provided for forward-compatibility only.


Message: CAN0_MSG_SOE

Message ID: 0x160

DLC: 8

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

Unit

Byteorder

This message is currently not backed up with information and provided for forward-compatibility only.


Message: CAN_MinMaxCellVoltages

Message ID: 0x170

DLC: 8

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

Unit

Byteorder

CAN0_SIG_Cellvolt_mean

0

16

0.0

65535

1.0

0.0

mV

Intel

CAN0_SIG_Cellvolt_min

16

16

0.0

65535

1.0

0.0

mV

Intel

CAN0_SIG_Cellvolt_max

32

16

0.0

65535

1.0

0.0

mV

Intel

CAN0_SIG_ModNumber_volt_min

48

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_ModNumber_volt_max

56

8

0.0

255

1.0

0.0

none

Intel

The minimum, maximum and mean voltage are transmitted in the signals CAN0_SIG_Cellvolt_min, CAN0_SIG_Cellvolt_max and CAN0_SIG_Cellvolt_mean. Additionally, the number of the module with minimum and maximum voltage is indicated in the signals CAN0_SIG_ModNumber_volt_min and CAN0_SIG_ModNumber_volt_max. Indexing of module numbers starts from zero.


Message: CAN0_MSG_SOV

Message ID: 0x171

DLC: 8

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

Unit

Byteorder

This message is currently not backed up with information and provided for forward-compatibility only.


Message: CAN0_MinMaxCellTemperatures

Message ID: 0x180

DLC: 8

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

Unit

Byteorder

CAN0_SIG_Celltemp_mean

0

16

-128.0

527.35

0.01

-128.0

°C

Intel

CAN0_SIG_Celltemp_min

16

16

-128.0

527.35

0.01

-128.0

°C

Intel

CAN0_SIG_Celltemp_max

32

16

-128.0

527.35

0.01

-128.0

°C

Intel

CAN0_SIG_ModNumber_temp_min

48

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_ModNumber_temp_max

56

8

0.0

255

1.0

0.0

none

Intel

The minimum, maximum and mean temperature are transmitted in the signals CAN0_SIG_Celltemp_min, CAN0_SIG_Celltemp_max and CAN0_SIG_Celltemp_mean, respectively. Additionally, the number of the module with minimum and maximum temperature is indicated in the signals CAN0_SIG_ModNumber_temp_min and CAN0_SIG_ModNumber_temp_max, respectively. Indexing of module numbers starts from zero.


Message: CAN0_Tempering

Message ID: 0x190

DLC: 8

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

Unit

Byteorder

CAN0_SIG_CoolingNeeded

0

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_HeatingNeeded

8

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_TemperingDemand

16

32

0.0

0xFFFFFFFF

1.0

0.0

none

Intel

The signals CAN0_SIG_CoolingNeeded, CAN0_SIG_HeatingNeeded and CAN0_SIG_TemperingDemand are left free for use for application specific development. Here, CAN0_SIG_CoolingNeeded and CAN0_SIG_HeatingNeeded could be simple ON/OFF flags and CAN0_SIG_TemperingDemand could be a ‘continuous’ value indicating the needed cooling/heating power.


Message: CAN0_Insulation

Message ID: 0x1A0

DLC: 8

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

Unit

Byteorder

CAN0_SIG_InsulationStatus

0

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_InsulationValue

8

16

0.0

65535

1.0

0.0

kOhm

Intel

The signal CAN0_SIG_InsulationStatus indicates if the insulation value is greater than the threshold value and CAN0_SIG_InsulationValue holds the measured insulation value by the insulation monitoring device.


Message: CAN0_MovAveragePower_0

Message ID: 0x1D0

DLC: 8

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

Unit

Byteorder

CAN0_SIG_MovAverage_Power_1s

0

32

-2500000

4292467295

1.0

-2500000

W

Intel

CAN0_SIG_MovAverage_Power_5s

32

32

-2500000

4292467295

1.0

-2500000

W

Intel

Message: CAN0_MovAveragePower_1

Message ID: 0x1D1

DLC: 8

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

Unit

Byteorder

CAN0_SIG_MovAverage_Power_10s

0

32

-2500000

4292467295

1.0

-2500000

W

Intel

CAN0_SIG_MovAverage_Power_30s

32

32

-2500000

4292467295

1.0

-2500000

W

Intel

Message: CAN0_MovAveragePower_2

Message ID: 0x1D2

DLC: 8

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

Unit

Byteorder

CAN0_SIG_MovAverage_Power_60s

0

32

-2500000

4292467295

1.0

-2500000

W

Intel

CAN0_SIG_MovAverage_Power_config

32

32

-2500000

4292467295

1.0

-2500000

W

Intel

The messages CAN0_MovAveragePower_0, CAN0_MovAveragePower_1 and CAN0_MovAveragePower_2 provide moving average values over the different time frames 1s, 5s, 10s, 30s and 60s. The signal CAN0_SIG_MovAverage_Power_config can be configured to an arbitrary duration. The default configuration is 3 seconds.


Message: CAN0_MovAverageCurrent_0

Message ID: 0x1E0

DLC: 8

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

Unit

Byteorder

CAN0_SIG_MovAverage_Current_1s

0

32

-2500000

4292467295

1.0

-2500000

mA

Intel

CAN0_SIG_MovAverage_Current_5s

32

32

-2500000

4292467295

1.0

-2500000

mA

Intel

Message: CAN0_MovAverageCurrent_1

Message ID: 0x1E1

DLC: 8

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

Unit

Byteorder

CAN0_SIG_MovAverage_Current_10s

0

32

-2500000

4292467295

1.0

-2500000

mA

Intel

CAN0_SIG_MovAverage_Current_30s

32

32

-2500000

4292467295

1.0

-2500000

mA

Intel

Message: CAN0_MovAverageCurrent_2

Message ID: 0x1E2

DLC: 8

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

Unit

Byteorder

CAN0_SIG_MovAverage_Current_60s

0

32

-2500000

4292467295

1.0

-2500000

mA

Intel

CAN0_SIG_MovAverage_Current_config

32

32

-2500000

4292467295

1.0

-2500000

mA

Intel

The messages CAN0_MovAverageCurrent_0, CAN0_MovAverageCurrent_1 and CAN0_MovAverageCurrent_2 provide moving mean values over the different time frames 1s, 5s, 10s, 30s and 60s. The signal CAN0_SIG_MovAverage_Current_config can be configured to an arbitrary duration. The default configuration is 3 seconds.


Message: CAN0_PackVoltage

Message ID: 0x1F0

DLC: 8

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

Unit

Byteorder

CAN0_SIG_PackVolt_Battery

0

32

0.0

4294967295

1.0

0.0

mV

Intel

CAN0_SIG_PackVolt_PowerNet

32

32

0.0

4294967295

1.0

0.0

mV

Intel

The signal CAN0_SIG_PackVolt_Battery provides the measured battery pack voltage (V0 Sense) from the current sensor between Battery MINUS and Battery PLUS. CAN0_SIG_PackVolt_PowerNet contains the power net voltage measured between Battery MINUS and Load PLUS (V2 Sense). See Fig. 6.4 for a detailed BJB block diagram.


Message: CAN0_Cell_voltage_M0_0

Message ID: 0x200

DLC: 8

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

Unit

Byteorder

CAN0_SIG_Mod0_volt_valid_0_2

0

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_Mod0_volt_0

8

16

0.0

65535

1.0

0.0

mV

Intel

CAN0_SIG_Mod0_volt_1

24

16

0.0

65535

1.0

0.0

mV

Intel

CAN0_SIG_Mod0_volt_2

40

16

0.0

65535

1.0

0.0

mV

Intel

Message: CAN0_Cell_voltage_M0_1

Message ID: 0x201

DLC: 8

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

Unit

Byteorder

CAN0_SIG_Mod0_volt_valid_3_5

0

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_Mod0_volt_3

8

16

0.0

65535

1.0

0.0

mV

Intel

CAN0_SIG_Mod0_volt_4

24

16

0.0

65535

1.0

0.0

mV

Intel

CAN0_SIG_Mod0_volt_5

40

16

0.0

65535

1.0

0.0

mV

Intel

Message: CAN0_Cell_voltage_M0_2

Message ID: 0x202

DLC: 8

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

Unit

Byteorder

CAN0_SIG_Mod0_volt_valid_6_8

0

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_Mod0_volt_6

8

16

0.0

65535

1.0

0.0

mV

Intel

CAN0_SIG_Mod0_volt_7

24

16

0.0

65535

1.0

0.0

mV

Intel

CAN0_SIG_Mod0_volt_8

40

16

0.0

65535

1.0

0.0

mV

Intel

Message: CAN0_Cell_voltage_M0_3

Message ID: 0x203

DLC: 8

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

Unit

Byteorder

CAN0_SIG_Mod0_volt_valid_9_11

0

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_Mod0_volt_9

8

16

0.0

65535

1.0

0.0

mV

Intel

CAN0_SIG_Mod0_volt_10

24

16

0.0

65535

1.0

0.0

mV

Intel

CAN0_SIG_Mod0_volt_11

40

16

0.0

65535

1.0

0.0

mV

Intel

Message: CAN0_Cell_voltage_M0_4

Message ID: 0x204

DLC: 8

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

Unit

Byteorder

CAN0_SIG_Mod0_volt_valid_12_14

0

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_Mod0_volt_12

8

16

0.0

65535

1.0

0.0

mV

Intel

CAN0_SIG_Mod0_volt_13

24

16

0.0

65535

1.0

0.0

mV

Intel

CAN0_SIG_Mod0_volt_14

40

16

0.0

65535

1.0

0.0

mV

Intel

Message: CAN0_Cell_voltage_M0_5

Message ID: 0x205

DLC: 8

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

Unit

Byteorder

CAN0_SIG_Mod0_volt_valid_15_17

0

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_Mod0_volt_15

8

16

0.0

65535

1.0

0.0

mV

Intel

CAN0_SIG_Mod0_volt_16

24

16

0.0

65535

1.0

0.0

mV

Intel

CAN0_SIG_Mod0_volt_17

40

16

0.0

65535

1.0

0.0

mV

Intel

Three cell voltages are transmitted within one CAN message. The signal CAN0_SIG_Modx_volt_valid_x_x contains three valid flags (bit 0, 1 and 2) for the voltages transmitted in the same messages. 0 –> valid cell voltage, 1 –> invalid cell voltage. Signal CAN0_SIG_Mod0_volt_valid_6_8 for example indicates valid cell voltages with

  • bit[0]: Module 0 cell voltage 6

  • bit[1]: Module 0 cell voltage 7

  • bit[2]: Module 0 cell voltage 8


Message: CAN0_Cell_temperature_M0_0

Message ID: 0x210

DLC: 8

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

Unit

Byteorder

CAN0_SIG_Mod0_temp_valid_0_2

0

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_Mod0_temp_0

8

16

-128.0

527.35

0.01

-128.0

°C

Intel

CAN0_SIG_Mod0_temp_1

24

16

-128.0

527.35

0.01

-128.0

°C

Intel

CAN0_SIG_Mod0_temp_2

40

16

-128.0

527.35

0.01

-128.0

°C

Intel

Message: CAN0_Cell_temperature_M0_1

Message ID: 0x211

DLC: 8

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

Unit

Byteorder

CAN0_SIG_Mod0_temp_valid_3_5

0

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_Mod0_temp_3

8

16

-128.0

527.35

0.01

-128.0

°C

Intel

CAN0_SIG_Mod0_temp_4

24

16

-128.0

527.35

0.01

-128.0

°C

Intel

CAN0_SIG_Mod0_temp_5

40

16

-128.0

527.35

0.01

-128.0

°C

Intel

Message: CAN0_Cell_temperature_M0_2

Message ID: 0x212

DLC: 8

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

Unit

Byteorder

CAN0_SIG_Mod0_temp_valid_6_8

0

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_Mod0_temp_6

8

16

-128.0

527.35

0.01

-128.0

°C

Intel

CAN0_SIG_Mod0_temp_7

24

16

-128.0

527.35

0.01

-128.0

°C

Intel

CAN0_SIG_Mod0_temp_8

40

16

-128.0

527.35

0.01

-128.0

°C

Intel

Message: CAN0_Cell_temperature_M0_3

Message ID: 0x213

DLC: 8

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

Unit

Byteorder

CAN0_SIG_Mod0_temp_valid_9_11

0

8

0.0

255

1.0

0.0

none

Intel

CAN0_SIG_Mod0_temp_9

8

16

-128.0

527.35

0.01

-128.0

°C

Intel

CAN0_SIG_Mod0_temp_10

24

16

-128.0

527.35

0.01

-128.0

°C

Intel

CAN0_SIG_Mod0_temp_11

40

16

-128.0

527.35

0.01

-128.0

°C

Intel

Three cell temperatures are transmitted within one CAN message. The signal CAN0_SIG_Modx_temp_valid_x_x contains three valid flags (bit 0, 1 and 2) for the temperatures transmitted in the same messages. 0 –> valid temperature, 1 –> invalid temperature. Signal CAN0_SIG_Mod0_temp_valid_6_8 for example indicates valid cell temperatures with

  • bit[0]: Module 0 cell temperature 6

  • bit[0]: Module 0 cell temperature 7

  • bit[0]: Module 0 cell temperature 8

Currently, the valid signals are not backed up with information and provided for forward-compatibility only. Therefore the flags always indicate valid cell voltages.


Message: CAN0_MSG_ISENS_TRIG

Message ID: 0x35B

DLC: 8

Signal name

Start bit

Bit length

Min

Max

Factor

Offset

Unit

Byteorder

CAN0_SIG_ISA_Trigger

0

32

0.0

0xFFFFFFFF

1.0

0.0

none

Intel

ISENS_Trigger is set to 0x31FFFF and sent via CAN bus to trigger a current sensor measurement cycle. This is the command of the Isabellenhütte sensor to trigger a measurement of all internal measurement channels when the sensor is not configured in cyclic mode.